6.5 CM Help Out a New Guy (sort of)

[jps24]

Hey all,

I've gotten back into precision shooting after about 5 years. I have load data for my 6.5 CM using 140gr Berger Hybrid Targets on a 24" barrel, 41.7gr of H-4350 powder, Federal GM210M primers, and 2.220" CBTO. But all this was developed over 5 years ago, and I will need a new barrel relatively soon. I get 2722 fps with around 5 standard deviation and about 1/2 MOA group sizes.

Can you all please walk me through how to develop powder weight and seating depth again? I sort of recall my process, but would appreciate the input especially if there are any tips to transitioning a load to a new barrel.

Thanks.

 

[Rob01]

Nothing complicated. Just drop the powder charge some and if the same chamber as in the barrel you have now then use the same OAL you are using to start.