cohunt
Well-Known Member
1x fired brass from a different rifle, bet your gonna either need the Larry Willis die or new brass to completely remedy this issue
Yea, I'm thinking using some new Nosler brass and firing/developing it in this rifle is probably the easiest fix. I'm going to load a bullet in a piece of new brass and see if I have any of these issues.1x fired brass from a different rifle, bet your gonna either need the Larry Willis die or new brass to completely remedy this issue
I might guess this is the issue. There has to be some measurable difference in the brass that fits and that doesn't. New brass or a collet die as mentioned earlier. I might take a factory round shoot it. Then rechamber that piece of brass right there. If it rechambers fine now go resize it. If it still chambers again get the collet die or new brass. I've never had to try the collet die as I only have 1 300 win mag but I've read about it on more than 1 occasion.There is a lot to take in here on this thread now. Especially since I'm not a seasoned vet at reloading.
To respond to a few of you guys at once here goes:
2. The brass was fired in a different 300 win mag than I'm currently trying to reload for
One more thing to think about. When you full length resize are you getting a good cam over when the handle of the press is in the fully down position?
Is your FL sizer die set deep enough so the press cams over with some pressure? If not try adjusting the die for such. Most die company's require a good solid came over before trying to size the brass.
If its not a good cam over when you start running brass through it you will not get a consistent shoulder set back. A good solid cam over helps with consistency.
I thought about that late last night also so I found a piece of brass that wouldn't chamber and adjusted my die down so I had a good cam over and it still wouldn't chamber. I then adjusted it down even more(to the extent that there was almost a pop when it would cam over) and it would chamber but not easily. I'm going to try this on another piece or two when I get home tonight to see if that fixes the brass issue. But based on how aggressive it was caming over, I don't think that's the issue. But maybe