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Blocking a .308 magazine for the 6mm BR

Shown below are step by step photos of blocking a .308 magazine to allow the shorter 6mm BR to feed out of the
magazine. The only magazine that I've done like this that wouldn't feed was for a .20 BR which is shorter than the
6mm BR. The .20 BR needed a longer magazine block. I figure the block from a .221 Fireball and .221 Fireball mag-
azine spring would have worked on it. Note: This modification will help the 6 BR feed from the magazine, however
there have been problems with the BR length cases ejecting from the loading port. This is caused by the short length
case ejecting into the lug area of the raceway. It can be corrected by installing a Sako style extractor above the lug
allowing the empty case to eject into the round portion of the raceway.

At left, is a Remington 700 .223 magazine.
At right, is a Remington 700 .308 magazine.

The rear of the .308 magazine has been cut with a Dremel cut
off wheel to make ears similar to what the .223 magazine has to
hold the magazine block from the .223 magazine.
Above, is a photo of the .308 magazine with the ears bent over. The .308 magazine with the block from the .223 magazine in place.
The rear of a .308 follower has been cut off to fit in the blocked .308 magazine. The rear of the follower has been beveled to allow the bolt to close without having to push the follower down.
Above, is the follower in place in the blocked magazine. A magazine spring from a .223 magazine is used instead of the .308 spring.
Bryant Custom Precision Riflesmithing  
Bryant Custom Precision Riflesmithing