Originally Posted by
Semisane
That's not going to work for you 50Cal. The GM .54 replacement barrels are 1:70 twist round ball barrels. I don't see any way that would stabilize a 500 grain bullet.
Its a .54 LongRangeHunter with the twist of 1:28.
http://www.gmriflebarrel.com/product...aspx?id=323938 I can buy it from them direct or Track of the Wolf. And MMP Sabots make the sabot to fit the .500 bullet.
http://www.mmpsabots.com/ Here are my xtps
http://www.cabelas.com/product/Shoot...3Bcat104275080
I've pretty much convinced myself in getting the barrel just gotta sell my Renegade .50 cal.