Hello everyone.
Let me start by saying I am already learning so much in the rimfire section and have received so much great advice. I don't feel like the dumb new guy asking silly questions. Secondly, I DON'T have a center fire rifle (yet lol) am not in the market for one (yet). Until this broken foot heals, all I can do is read and try and learn new things. If this is the wrong section for this then please move to the correct place.
I was reading about twist rates and how they interact with bullet weight. It seems slower twist rates work better for lighter bullets but tighter twists can shoot both lighter and heavier bullets within reason.
In general, I think this applies.....
1:16 = 30-40 gr
1:12 = 40-50 gr
1:10 = 40-60 gr
1:8 = 50-75 gr
1:7 = 60-80+gr
How does barrel length play into all this?
For these questions let's use a CZ 527. I pick this because at one time it had a 1:12 twist and now is 1:9 as a standard. I have seen barrel lengths from 18.5" up to 25.5" with the 1:9 twist and 24" (maybe others) with the 1:12. I am assuming the actions/triggers to be the same. Accuracy? Speed? Trajectory? Etc?
First, what is the difference be between a 527 with a 24" barrel and the 1:12 twist and the same 24" barrel with the 1:9 twist?
Second, what is the difference between a 527 with an 18" barrel and a 527 with a 25.5" barrel? (I think it was a Euro Varmint I saw this on) Both with the 9:1 twist.
Third, does a slower twist in a longer barrel give more speed to a heavier (45-60 gr) round? Or slower twist in a longer barrel characteristics in general.
Someday I'll be in the market for a new gun, but for now ill be happy with learning and shooting my little BRNO Model 2 rim fire.
Thanks for the education.