I have an option of a 20" barrel or a 24" barrel on a PCR-1 Ultramatch (Broach cut 416 stainless steel heavy barrel, 20" OAL, 1x8" twist). I intend to be shooting anywhere between 50-600 yards. I'm not sure what bullet grain I will typically be using yet...something between 55gr and 80gr.
I am trying to decide whether I should keep the stock 20" barrel, or have a 24" barrel installed. What would you guys suggest?
1) would 24" be too long for a 55gr bullet? I know that longer barrel only increases velocity to a certain point and then it's gonna start having an inverse effect
2) how much weight do you think it would add, about 1 pound i am thinking?
3) how much more MOA accuracy do you think I could expect at 600 yards?
4) is the number of revolutions of the bullet within a barrel a useful number? it would be 2.5 revs in a 20" and 3 revs in a 24". if this is a useful number, what is the significance of it?
5) in your opinion, is it worth it?
thanks!