Peterson 300 win long brass

[DoneNOut]

How's the case capacity on this long brass? Peterson is known for reduced capacity in other calibers.

 

[DoneNOut]

What's an acceptable amount of run out? I've been reloading for years but fairly new to the the super precise tricks. I'm getting around .003 average. I just took 25 new piece of brass, measured everything as I went, all was good and all had consistent neck tension of .002 and felt the same when seating a bullet.
My rifle is all high quality components. Bighorn action, proof barrel, Mesa stock, bedded and floated. It is a new rifle so I don't have a base line to compare to before working with the Peterson brass.

.003 is just fine. I did a blind test of different runout variance rounds 15yrs ago. .001, .003, .008 concentricity. Sold my runout gauge after seeing no difference in groups between.001 and .008.

 

[Longtine88]

Agree with BFD it doesn't make much difference in accuracy I've found. That being said I check a round every blue moon and I haven't had anything over 0.001" and most of the time it's 0.0005".

 

[BrianID]

How's the case capacity on this long brass? Peterson is known for reduced capacity in other calibers.

Case capacity is significantly less than the Nosler, Hornady and Winchester brass I've used.

 

[BrianID]

I just started working with my 300 win mag and Peterson long brass. Has anybody have any experience with this brass yet?? It seem the the neck tension is extremely inconsistent on mine. The brass looks annealed from the factory, maybe not enough?? The groups reflect this as well. I will get 3 touching and a flyer 3/4-1" out
I'm going to try Annealing again and see if that resolves the issue.

About a month ago I loaded 150 rounds of Peterson 300 win mag long brass for my new 300 win mag. I've shot about 80 of the 150 so far. I'm getting 1/2 MOA with the first load in this brass and haven't noticed fliers unless I "pulled the shot". I did run the brass through a Redding neck sizing die before loading. I noticed no difference in pressure to seat the bullet.

I've loaded 6mm creedmoor Peterson brass straight from the box with no prep work and it still shot well.

I loaded some new 338 Lapua brass made by Lapua last month and only neck sized about 10 of the first 50. I noticed a big difference in tension in seating the bullet in the brass that wasn't neck sized. I should have neck sized all of them. I haven't shot them yet to see the difference on paper. For the moment I set them aside and won't use them for hunting. I'll probably shoot them for practice. I will be watching to see if there are any fliers.

 

[huntinfool18]

Just an update. I have been shooting this rifle about 10-12 times a day doing break in and load work. I still get the occasional flyer, not as many but still present. Could just be me. But for now I have settled on a load, wish is was a little faster but it'll do for now
Zeroed at 200yd. Came down a click, left a click and called it a day.