Thread: Brass thickness vs capacity question

Originally Posted by scaggly

Hmmm.... I'm no expert on .270. How deep do your usual pills seat into the case? If it is a lot different, I'd back off to a min load, and work back up again from scratch.

Not that deep. Can't really compare apples with oranges in terms of what I normally use - 130gr Sierra SPBT and the 140gr HPBT,but there is alot of difference - the 130gr get seated .306" in compared to the .434" of the 140gr.The 140 are a longer bullet by .060" but the ogive must be closer to the tip than what the 130 are as they have to be seated deeper. I think i'll just have to choose what brass and want to use and load them to suit. I was just amazed that there would be that much difference in capacity.

Originally Posted by puku

What is your OAL?
Yes as scraggly says it will pay to start at minimum again. I help load for a 270win A bolt and its OAL is quite low also, I can't remember without looking in book but it meant we stayed under max books loads.

Is yours an A bolt?


Also when your weighed them were they treated the same before weighing? I.e. trimmed to same length, both chamfered, same primers? Would there be any difference like those?

Puku

Funny enough my rifle is an A-bolt. the OAL is 3.261" with the 140gr. and 3.322 with the 130gr. In terms of case prep, the noslers are straight out of the packet ready to load, so I did not prep them. Case length difference between the two is .020". Not too much of a factor in this case i thought??

Originally Posted by Pnumatix

Just trying to get my head round this. You are using these projectiles for the first time in either brand of case? You have not used the Nozzler caes before?
I am lead to believe that Norma make the cases for Nosler. It probably wouldn't take much of a change in brass alloy composiyion to make 1 grain difference in case volume with the weight staying the same between to manufactures cases. I have found that Norma cases normally have a greater capacity than other brands (in the calibres I shoot) and I have to drop my charge weights for loads worked up in them if I go to Fedral or Remingtom cases.

Yes correct, using the projectiles for the first time in both cases. Never used Nosler before at all, but have used the federal many times with the 130gr sierras and other projectiles.

I guess our situations are backwards - I'm finding the federals will hold more than the noslers. They're both nice and heavyish brass - I was using Hornady for a while and found them to be shithouse!! Lightweight and the brass weight very inconsistent.

Cheers for the replies everyone.

G