{"id":8802,"date":"2014-04-19T12:56:12","date_gmt":"2014-04-19T12:56:12","guid":{"rendered":"http:\/\/ramworks.net\/blog\/?p=8802"},"modified":"2016-08-23T04:15:50","modified_gmt":"2016-08-23T04:15:50","slug":"pf-vs-crf-the-easter-bunny","status":"publish","type":"post","link":"https:\/\/empty-cases.com\/blog\/pf-vs-crf-the-easter-bunny\/","title":{"rendered":"PF vs. CRF & The Easter Bunny"},"content":{"rendered":"

 <\/p>\n

\"CRF-2\"<\/a><\/p>\n

One of the longest running rifle debates is the control-round-feed (CRF) vs. push-feed (PF) argument, which is primarily focused on rifles for dangerous game. Conventional wisdom dictates when a fellow is confronted with a critter that might stomp him into a blood puddle, rifle reliability is paramount. Some believe this reliability is best achieved with a CRF action, others declare a PF action is sufficient. Maybe only the Easter Bunny knows the true answer.<\/p>\n

You should understand the difference in the two action types. CRF actions control the cartridge from the time it leaves the magazine until it is ejected. With a PF action the cartridge is pushed into the chamber from the magazine. The extractor on the bolt does not engage the rim of the cartridge to gain control until the bolt is completely shut and the handle rotated down.<\/p>\n

\"CRF-3\"<\/a>
With a PF – plunder ejection – rifle the empty or cartridge is beginning to get out and will as soon as its length clears the front of the action. Yes, they say plunger ejectors can break but I’ve NEVER seen it happen.<\/span><\/figcaption><\/figure>\n

If you do not fully close a PF action and attempt to cycle the bolt a second time you will likely induce a double feed where one cartridge is in the chamber and another is trying to get there. Not good! Some folks call this short stroking but its actually a failure to fully cycle. Short stroking is when you do not pull the bolt all the way to the rear before attempting to close it.<\/p>\n

\"CRF-1\"<\/a>
With a CRF – fixed ejector – rifle you must pull the bolt completely to the rear to force ejection. Yes, though some think it not so, you can get a double feed in a CRF rifle.<\/span><\/figcaption><\/figure>\n

If you short stoke a PF action with a plunger ejector you will not<\/strong> <\/em>induce a double feed because the cartridge case will be ejected from the rifle before the bolt travels to the rear far enough to get behind the rim of the cartridge in the top of the magazine box. However, it is possible to short stroke a CRF action so that the bolt clears the rim of the top cartridge in the magazine box prior to the ejection of the cartridge being extracted. If you do this and shove the bolt forward you will induce a double feed so severe even Capstick could not have eloquently explained it.<\/p>\n

The circumstances that can lead to a double feed with CRF actions are exaggerated by hard kicking dangerous game rifles. During recoil the cartridges in the magazine box can<\/strong><\/em> slip forward, increasing the distance between the rim of these cartridges and the fixed ejector. The result is the stroke necessary to induce a double feed shortens.<\/p>\n

Think About This<\/h4>\n

Here is another often overlooked down side to the CRF action. One that is tuned properly can only feed from the magazine box. That means if you are shooting it out with a bad beast and run your gun dry, you cannot<\/em> just drop a cartridge into the ejection port and close the action. You must<\/em> load it into the magazine box. This of course is not the case with the PF action. (Some actions thought to be CRF are actually not and will allow you to feed a cartridge like you can with a PF. You’ll find this in Ruger 77s about half the time.) You could argue this is a good thing but a CRF action that allows this sacrifices the extraction properties commonly touted for this type action.<\/p>\n

Experience is the Best Teacher<\/h4>\n
\"Craig
Craig Boddington<\/span><\/figcaption><\/figure>\n

My experience facing bad beasties with a firearm have mostly been in uniform and in the presence of animals substantially more dangerous than those walking on four legs. I’m not the best source for field experience when it comes to dangerous game rifles. Craig Boddington is. If you’d go to Africa twice a year for the rest of your life you’ll die before you could equal his number of safaris. Craig told me, \u201c\u2026I think that the actual difference in reliability is much more theoretical than practical.\u201d<\/em><\/p>\n

\"Don
Don Heath<\/span><\/figcaption><\/figure>\n

The\u00a0late Don Heath, who was\u00a0in charge of research and development at Norma, has seen the elephant in more ways than one. \u00a0Don has faced multitudes of dangerous situations as a soldier and hunter. He also purveyed over the Zimbabwe professional hunter’s examination for some time, where he got to see a lot of guns work. And fail.<\/p>\n

Heath told me, “I have seen many, many CRF weapons jamb. I have seen many PF rifles – mostly Winchester M70\u2019s – function 100% fine. There are problem rifles; the Remington 700 in .416 Remington is a particular example. And, I hate Weatherbys. I’ve seen them seize up and their ejectors disintegrate but have never seen one fail to feed. Many hold the Mauser in the highest regard and when properly built<\/strong>, it works. At the end of the day, the feed mechanism is irrelevant, provided the rifle is 100% reliable in both feeding and ejecting under all conditions. The three requirements for a dangerous game rifle are reliability, reliability and reliability.”<\/em><\/p>\n

It’s my opinion the CRF vs. PF debate is about as important as arguing the existence of the Easter Bunny. Having a rifle that works, working it properly under stress, and feeding it quality ammunition is much more important. Being able to shoot repetitively with speed and accuracy is important too. This is something you can definitely improve on if you’ll get off the couch, put down the chocolate eggs, and go practice.<\/p>\n","protected":false},"excerpt":{"rendered":"

  One of the longest running rifle debates is the control-round-feed (CRF) vs. push-feed (PF) argument, which is primarily focused on rifles for dangerous game. Conventional wisdom dictates when a fellow is confronted with a critter that might stomp him into a blood puddle, rifle reliability is paramount. Some believe this reliability is best achieved with a CRF action, others declare a …<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[2522],"tags":[588,589,590,82],"class_list":["post-8802","post","type-post","status-publish","format-standard","hentry","category-hunt","tag-buffalo-hunting","tag-crf-vs-pf","tag-dangerous-game-rifles","tag-gunsite"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5hujZ-2hY","jetpack-related-posts":[{"id":12989,"url":"https:\/\/empty-cases.com\/blog\/the-passing-of-a-real-hunter-learn-from-those-who-know-while-you-can\/","url_meta":{"origin":8802,"position":0},"title":"The Passing of a REAL Hunter – Learn from those who know, while you can.","author":"gunwriter","date":"February 17, 2016","format":false,"excerpt":"I first met Don Heath about five years ago during a hunt in Sweden. He was working for\u00a0Norma. They were lucky to have him. Don had more experience doing dangerous things, with guns, in dangerous places, than most could ever imagine. He was also a humble man, eager to lend\u2026","rel":"","context":"In "EDITORIAL"","block_context":{"text":"EDITORIAL","link":"https:\/\/empty-cases.com\/blog\/category\/editorial\/"},"img":{"alt_text":"D-5","src":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/02\/D-5.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/02\/D-5.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/02\/D-5.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/02\/D-5.jpg?resize=700%2C400 2x"},"classes":[]},{"id":11741,"url":"https:\/\/empty-cases.com\/blog\/a-rifle-like-a-reese-cup\/","url_meta":{"origin":8802,"position":1},"title":"A Rifle Like a Reese Cup","author":"gunwriter","date":"June 18, 2015","format":false,"excerpt":"Throwback Thursday: This is an updated \/ condensed version of the first article I wrote about Melvin Forbes and New Ultra Light Arms. It was first published in Gunworld magazine in 2003. The Reese Cup may just be the ultimate candy bar: Peanut butter surrounded by just the right amount\u2026","rel":"","context":"In "HUNTING"","block_context":{"text":"HUNTING","link":"https:\/\/empty-cases.com\/blog\/category\/hunt\/"},"img":{"alt_text":"NULA-1","src":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2015\/06\/NULA-1.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2015\/06\/NULA-1.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2015\/06\/NULA-1.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2015\/06\/NULA-1.jpg?resize=700%2C400 2x"},"classes":[]},{"id":14250,"url":"https:\/\/empty-cases.com\/blog\/i-have-this-rifle\/","url_meta":{"origin":8802,"position":2},"title":"I Have This Rifle","author":"gunwriter","date":"February 27, 2017","format":false,"excerpt":"There are five rifles from New Ultra Light Arms\u00a0(NULA) that live in my house. I could not bring myself to part with any of them. My NULA 22 LR is a single shot. It has potted a lot of squirrels and I used it on Christmas day to shoot my\u2026","rel":"","context":"In "EDITORIAL"","block_context":{"text":"EDITORIAL","link":"https:\/\/empty-cases.com\/blog\/category\/editorial\/"},"img":{"alt_text":"35 Zebra","src":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2017\/02\/35-Zebra.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2017\/02\/35-Zebra.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2017\/02\/35-Zebra.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2017\/02\/35-Zebra.jpg?resize=700%2C400 2x"},"classes":[]},{"id":8612,"url":"https:\/\/empty-cases.com\/blog\/express-yourself\/","url_meta":{"origin":8802,"position":3},"title":"Express Yourself","author":"gunwriter","date":"March 18, 2014","format":false,"excerpt":"Nothing like a new gun, except maybe a new, old gun with some personalized customization. Maybe one even chambered for a new cartridge. I\u2019ve been working on two projects for the last several months and both are based on Mossberg\u2019s MVP Predator rifle. I\u2019ve been a fan of the MVP\u2026","rel":"","context":"In "DEFENSE"","block_context":{"text":"DEFENSE","link":"https:\/\/empty-cases.com\/blog\/category\/defense\/"},"img":{"alt_text":"What does that say on the barrel?","src":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2014\/03\/MVP-4-300x201.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":13451,"url":"https:\/\/empty-cases.com\/blog\/one-cartridge-for-the-world\/","url_meta":{"origin":8802,"position":4},"title":"One Cartridge for the World","author":"gunwriter","date":"June 6, 2016","format":false,"excerpt":"If you were going to create one big game cartridge for the world\u00a0how would you codify the creation? Well, how about this? The cartridge should be able to push a bullet fast and flat enough to limit trajectory as much as possible. The bullet should provide enough penetration to pass\u2026","rel":"","context":"In "HUNTING"","block_context":{"text":"HUNTING","link":"https:\/\/empty-cases.com\/blog\/category\/hunt\/"},"img":{"alt_text":"308-5","src":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/06\/308-5.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/06\/308-5.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/06\/308-5.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/06\/308-5.jpg?resize=700%2C400 2x"},"classes":[]},{"id":13680,"url":"https:\/\/empty-cases.com\/blog\/dove-customs-mossberg-patriot-scout-first-shots\/","url_meta":{"origin":8802,"position":5},"title":"Dove Custom’s Mossberg Patriot Scout – First Shots","author":"gunwriter","date":"July 24, 2016","format":false,"excerpt":"Scout Rifles can become obsessive, especially if you worship at the altar of lightweight. Prior to the 2016 Scout Rifle Conference at Gunsite Academy I asked my local master gunsmith Jerry Dove of Dove Custom Guns if he would like to work with me on a Scout Rifle project. He\u2026","rel":"","context":"In "DEFENSE"","block_context":{"text":"DEFENSE","link":"https:\/\/empty-cases.com\/blog\/category\/defense\/"},"img":{"alt_text":"MPSR-5","src":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/07\/MPSR-5.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/07\/MPSR-5.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/07\/MPSR-5.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/empty-cases.com\/blog\/wp-content\/uploads\/2016\/07\/MPSR-5.jpg?resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/posts\/8802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/comments?post=8802"}],"version-history":[{"count":6,"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/posts\/8802\/revisions"}],"predecessor-version":[{"id":13820,"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/posts\/8802\/revisions\/13820"}],"wp:attachment":[{"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/media?parent=8802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/categories?post=8802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/empty-cases.com\/blog\/wp-json\/wp\/v2\/tags?post=8802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}