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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Best Budget Custom Action Currently
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<blockquote data-quote="WiscGunner" data-source="post: 1648549" data-attributes="member: 97288"><p>A little off subject but ... just an FYI for anyone considering the Origin (or TL3) from Bighorn. Be aware the Bighorn Origin/TL3 are true Controlled Round Feed/Controlled Round Extract ... if used with the proper magazine setup. </p><p></p><p>This is my TL3 with was certainly a Push Feed /Controlled Extract with stock AICS magazines. It is important to understand the AICS magazine design is based upon a .308 cartridge and NOT any other cartridge dimensions. Therefore the shoulder can be in the wrong place related to the end of the feedlips as seen in the picture comparing magazines. In this case, this barrel is chambered in 6.5 Creedmoor.</p><p>Top is ARC (in back) compared to AICS (front). </p><p>Bottom is AICS roughed in for cartridge</p><p>[ATTACH=full]136848[/ATTACH] </p><p>Also pictured is a 6.5 Creedmoor in a stock .308 AICS magazine. Note the Feed lips do not allow for proper feeding which is accomplished by the lower cartridge relation to the upper cartridge. In the stock magazine the upper cartridge is being pushed up by the neck which does not allow enough height to get the case head under the claw in the bolt face for Controlled Round Feeding. I have video of this is necessary.</p><p> </p><p>[ATTACH=full]136849[/ATTACH]</p><p></p><p>Once the magazine is properly fitted for the desired cartridge, in this case a 6.5 Creedmoor, the upper cartridge to be fed into the chamber is now fed into the bolt face by the body diameter which gives enough height to get the cartridge to pop up into the bolt head and be Controlled by the claw. In the picture below is a American Rifle Company aics pattern magazine with shorter lips. Coincidentally ARC makes CRF actions...</p><p>[ATTACH=full]136850[/ATTACH] </p><p></p><p>Video of this in action with a fitted magazine.</p><p>[MEDIA=youtube]44ZbQ0GQGTM[/MEDIA]</p><p></p><p>So if anyone is considering a Bighorn do not shy away. This is an excellent action with great features if the gunsmith putting it together understand how CRF works. Most do not.</p></blockquote><p></p>
[QUOTE="WiscGunner, post: 1648549, member: 97288"] A little off subject but ... just an FYI for anyone considering the Origin (or TL3) from Bighorn. Be aware the Bighorn Origin/TL3 are true Controlled Round Feed/Controlled Round Extract ... if used with the proper magazine setup. This is my TL3 with was certainly a Push Feed /Controlled Extract with stock AICS magazines. It is important to understand the AICS magazine design is based upon a .308 cartridge and NOT any other cartridge dimensions. Therefore the shoulder can be in the wrong place related to the end of the feedlips as seen in the picture comparing magazines. In this case, this barrel is chambered in 6.5 Creedmoor. Top is ARC (in back) compared to AICS (front). Bottom is AICS roughed in for cartridge [ATTACH=full]136848[/ATTACH] Also pictured is a 6.5 Creedmoor in a stock .308 AICS magazine. Note the Feed lips do not allow for proper feeding which is accomplished by the lower cartridge relation to the upper cartridge. In the stock magazine the upper cartridge is being pushed up by the neck which does not allow enough height to get the case head under the claw in the bolt face for Controlled Round Feeding. I have video of this is necessary. [ATTACH=full]136849[/ATTACH] Once the magazine is properly fitted for the desired cartridge, in this case a 6.5 Creedmoor, the upper cartridge to be fed into the chamber is now fed into the bolt face by the body diameter which gives enough height to get the cartridge to pop up into the bolt head and be Controlled by the claw. In the picture below is a American Rifle Company aics pattern magazine with shorter lips. Coincidentally ARC makes CRF actions... [ATTACH=full]136850[/ATTACH] Video of this in action with a fitted magazine. [MEDIA=youtube]44ZbQ0GQGTM[/MEDIA] So if anyone is considering a Bighorn do not shy away. This is an excellent action with great features if the gunsmith putting it together understand how CRF works. Most do not. [/QUOTE]
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