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2 groove BAMM rifle


Blackfoot
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No experience with 2 grooves, but Cast Boolit site has lots of comments about them.  Sometimes a little harder to find a cast boolit that shoots well, but not impossible, according to them.  They are reported to like a long and fat nose design.

 

If you want to find 50 different opinions about this in one CB thread, check this one:

 

http://castboolits.gunloads.com/archive/index.php/t-191007.html

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  Blackfoot we have had good results with lead bullets in the 2 grove barrels.  I have several Springfield 1903 & 03A3's that shoot 1 to 1 1/2 MOA using lead bullets pushing them @ 1550 FPS.  I use Federal Large Gold Medal Primers and IMR 4759 Powder and a Gas Check Lead Bullet.  I have one 03A3 with a 4 grove barrel and I get the same results.

 

Goatneck

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