I’ve ordered a barrel from Preferred Barrel Blanks about 2 weeks ago but I am second-guessing my decisions for twist rate, length, and chamber dimensions. I have a handful of questions that I would love some help with.
Background: I have a Ruger American predator gen 1 in .308 that I have slowly been modifying over the years. This is the poor mans solution. Just start with a cheap reliable gun and slowly make it better. I started reloading when I purchased the gun and have really enjoyed the whole process. I want to make it a crossover between a hunting rifle / precision long-ish range. Over the years I have replaced everything besides the action and the barrel, and currently I get about 1.5" groups on average at 100 yards. I want it to be better in the average .75" groups range.
Current barrel: Stock 18" ruger american predator barrel 1-10 twist
New barrel I ordered:
Length: 20"
Profile: Medium Palma - Seemed to be a profile that was light enough, but still had enough metal behind it to not heat up super quick.
Twist: 1-12 - I want it to shoot lighter bullets better. Current 1-10 twist rifle does not shoot 150’s or lower well at all.
Chamber: Alpha munitions reamer - They have a SAAMI, and a Match chamber reamer as well. The alpha seemed to be the in-between sized one. I still want to be able to shoot pretty much any cartridge I want. I just want it to be a more modern, accurate and tighter fit than SAAMI, but I may be wrong.
I guess my question is, based on the background, my goals etc… would you talk me out of any of the above decisions on the new barrel? If so, I would love to get some of the reasoning behind it. I think I still have some time to shift