25 CM with 117-120 gr bullets

[Orchemo]

Playing around with a barrel not made with a fast twist. This ned to max out at 120 gr area.

Looking at 257 Robert's data.....good starting point?

 

[nockhunter]

Probably not a good idea. .257R has a bit more capacity than the CM case. You should be close with starting loads for 6.5CM with similar bullet weights. (.264" vs .257") Or even 6mmCM start loads .

Mike

 

[Orchemo]

seems people recommend 250 AI as a starting point.

Thanks