So I just got my 300 prc built a few weeks ago and have been shooting factory hornady match 225s. I wasn't getting the accuracy I wanted so I got a die and started doing some work up. I found a load my gun really liked at 79 grains of retumbo I set oal to the same as the factory stuff. Shot a 3 shot at .20 on center. However when I loaded it a second time testing the speed I got a case head separation. The brass has only been good for 2 firings. Just wondering if anyone has had any issues like this. Maybe a bad batch of brass?
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Hornaday brass?
Measurements from fired case to setback after sizing?
Hornady is the only brass for the 300 prc so far.
Also, not a bad idea to run a go and nogo gauge if you have access to them.
Also, looks like 79gr is a hot load according to hornady. I am ignorant to the load data, just pointing out what you probably already know
Also, looks like 79gr is a hot load according to hornady. I am ignorant to the load data, just pointing out what you probably already know
I don't have a gauge to check it. I've always just set my full length dies and ran with it. I've never had any issues till now. I did try to measure it, it's basically the same. It's hard to see 10 thousandths just eye ballin it. I'm going to get a gauge this afternoon, and possibly a new batch of brass if they have it. If not then just some more boxes of the match ammo.
The only time I had happen I was working on a 22-250 load up around 3300 FPS but I had reloaded the brass six times and it wasn't but a few pieces
Gauge isn't necessary, but pretty darn handy. Maybe take a once fired and size it starting with your die a quarter turn from bottomed out. Try to chamber. Rinse and repeat till it isn't too snug
At the time I don't have access to a go nogo. Yes it's .1 over max from hornadys data. I have since backed it off trying to find a safer pressure load. The stuff from the factory is up in pressure as well. Most of it leaves a pretty good ejector mark and a flat primer. Now my new load is 77.5 of retumbo.
I personally would be more interested in the fl measurement being a light snug fit. That charge shouldn't be separating cases but who knows. I'm not there to verify so do what you deem safe
This was every other shot. That one being the worst of it. Most of the rest you could just see the crack starting. I only shot 5 or 6. The worst of it was I had loaded 20 to go test the ES and SD. So I had to pull them all and throw the brass away.
I started using a different brass and hadn't seen anything since
But you don't have that option
But you don't have that option
Not easy to set your dies up perfectly. I'd take a piece of paper folded over and put it between the shell holder and the die. If the case chambers easily then that will show how far off you were
