NEED HELP 308

[poke5353]

OK here is what I have. Terry Cross (KMW) built 308 with about 3000 rounds through it. I pruchased it with about 2500 rounds fired. I have always loaded my loads to 2.820 and not measured to the ogive. So I got a gauge to measure to the ogive and i started out by seating a bullet softly in a piece of brass to see where the bullet makes contact with the lans. So I got an overall measurement of 2.952 and an Ogive measurement of 2.288. This seems a little long but I am not sure. I am loading 155gr Sierra Palma. Does this seem right or do I need to have the barrel set back for better accuracy or should I shoot at maximum mag length. With 175gr pulled SMK I am getting .6" 10 shot groups at 100yds. But I am switching to 155gr now. Any opinions or advice would be greatly appreciated.

Thanks

 

[gcoulsey]

Re: NEED HELP 308

If your getting x10shot groups @.6 then I would leave the barrel alone lol!

I havnt used the 155palma, but that measurement doesn't sound ridiculously long or anything to worry about,
Is there any particular reason you wanted to load them out to the lands?
If not, then start at mag length with your development, find the charge weight it likes and fine tune it with seating depth.

If they absolutely don't like your setup, then try a different brand of 155's!

Or.. Load up and shoot the shit out of the 175's and have fun

 

[poke5353]

Re: NEED HELP 308

No reason for going all the way to the lands. I was just thinking I would need less jump than what I have. I will start out with 2.85 OAL and go from there.

Thanks