Hi all.
Due to a post that I made about a range testing some rounds and one round going way up in FPS I believed that the spike was caused by bullet set back. Some said that I needed a better set of dies than the Lee that I am using and didn't need to crimp the cases, I have always crimped my cases till this last set of loads and thought I would try what the cool kids are doing.
It didn't work out for me I ended up with a hot shot that blew out the primer and gave me a FPS that was 2590 FPS that should have been around 2400 FPS.
So what I just did was check the bullet size. I got .262 for the Hornady 6.5 SST 123gr. Then checked Sierra Game King 6.5 HPBT 130gr and got .2615 to .262.( three out of the five measured were .2615) Then I checked Hornady 6.5 SST 129gr and got .262. Then I took my Lee die apart and the ball on the decapper rod is .261 at the widest part. Now I have a Hornady die coming and I will measure it when it gets here. My question to all of you is what do your dies measure at that point?
In my dies case I would say .001 isn't enough to hold a bullet in place under recoil or loading. I would think it should be some where around .003 smaller than the bullet to get a tight grip. Any thoughts? Because I was just guessing. I know when we put sealed bearings on a pump shaft it was always over sized .002 to keep the inner race from turning on the pump shaft. Then that was hard steel on harder steel.
Any thoughts on the above or standers set by the industry that are known would be of great help.
Thank you much for any information that you can offer.
Due to a post that I made about a range testing some rounds and one round going way up in FPS I believed that the spike was caused by bullet set back. Some said that I needed a better set of dies than the Lee that I am using and didn't need to crimp the cases, I have always crimped my cases till this last set of loads and thought I would try what the cool kids are doing.
It didn't work out for me I ended up with a hot shot that blew out the primer and gave me a FPS that was 2590 FPS that should have been around 2400 FPS.
So what I just did was check the bullet size. I got .262 for the Hornady 6.5 SST 123gr. Then checked Sierra Game King 6.5 HPBT 130gr and got .2615 to .262.( three out of the five measured were .2615) Then I checked Hornady 6.5 SST 129gr and got .262. Then I took my Lee die apart and the ball on the decapper rod is .261 at the widest part. Now I have a Hornady die coming and I will measure it when it gets here. My question to all of you is what do your dies measure at that point?
In my dies case I would say .001 isn't enough to hold a bullet in place under recoil or loading. I would think it should be some where around .003 smaller than the bullet to get a tight grip. Any thoughts? Because I was just guessing. I know when we put sealed bearings on a pump shaft it was always over sized .002 to keep the inner race from turning on the pump shaft. Then that was hard steel on harder steel.
Any thoughts on the above or standers set by the industry that are known would be of great help.
Thank you much for any information that you can offer.
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