Ok guys need your help again. I am reloading for a ruger American 450bm. Unfortunately there is not much data published on this round and what is seems to focus on hornady fx bullets.
My question is how to pick min col? I had some good loads for for my 230 hp bullets with col of 2.10 as mentioned by some here and appear to work good from initial testing.
However a person on cast boolits forum sent me 100 rounds of 250 grain jacketed bullets he makes himself.
However I can find no information on 250 grn soft tip loads. It is all the xp tip rounds, which from their design are longer per weight than soft tip or the hp points I can get affordable.
Looking through posts on here and youtube,I see many different cols for different bullets and want to know how to select the correct one instead of having to ask someone what they use for each load. So how do you experts figure it out?
For the 250grns I guessed. I tried the col for the hornady in that weight( I think 2.20) but it was barely in the case, so I then went with 2.15 as it was a bit heavier than the 230s at 2.10. I didnt want to seat them too deep. From what I have read seating to deep can compress powder and cause over presure and problems.