As a first time pistol reloader like me I'll agree it is alot of info to gather up.Ya got OAL,head space, need jump time before bullet hit the rifleing etc.I was all over the net writeing this down,that down, printing stuff I found.Then it dawned on me that was all for nothing.Like lots have said here all guns are machined different.So I checked my sig and beretta for max COL with the sliding bullet, 124 grn.speer tmj, and the beretta came out at 1.300 and the sig was 1.228. I checked each gun 10 times to make sure.There is no
way i could load a round that long as it would almost fall out of the case before it would hit the riflings. next i checked head space,beretta was .751 sig was .760.Next i slugged the beretta barrel .347 on the lands and .355 in the grooves.The guns told me their limits.Haven't checked the sig yet.Most of the info went in wood stove.I saved info on the bullets i bought, speer,berry's and precision bullets and thats what i am going to use.