Keith Glasscock
Gold $$ Contributor
While not ideal, my guess is that the last .007" of fall isn't the problem.
I'm curious to see if the 450's will ignite on a fired ,sized case.All,
I have come to the conclusion that the number 450 primers with a hard cup coupled with a long headspace with new brass is causing the FTF problem. I will attempt to verify this suspicion by doing some load development in the next couple of days. Stay tuned for a follow up report.
Lloyd
I'm curious to see if the 450's will ignite on a fired ,sized case.
I’m sure they will, or at least I hope they do.I'm curious to see if the 450's will ignite on a fired ,sized case.
I had the same issues a couple of times when fireforming 6BRA cases with 20 grains of bullseye and 1/8 piece of toilet paper when I used BR4s. When I switched to Fed 205s or pistol primers I completely solved the problem.
My theory is when the case is not firmly held in place--like we get with a false shoulder or a jammed bullet, and we use a hard cup primer: the movement of case sometimes dissipates enough of the firing pin energy to prevent ignition.
When I was having issues I eventually did get all the FTF cases to fire by slamming the bolt closed and firing again. Some rounds need three attempts to fire. Again, a soft cup primer solved the issue.
Also, I have never had any FTF issues at all with fire formed cases and BR4s.
that's how I setup my HS just a little bit of feel on the bolt..with new brass that I will be shooting@1shot, I was/am having an issue with the chamber on my 06' headspace.
It was set up with go gauge, but then I had the pin bushed to stop primer flow. I believe he cleaned up the bolt face. 0015-.002. This coupled with some brass I moved the shoulders back to far I believe is what caused me to have some FtF.
I too set the depth of my pockets to whatever the Lyman tool is every time I clean them, and set my primers to bottom below flush.
Fast forward a couple more weeks, and I noticed to much brass flow when sizing.
After starting a thread on the subject i got some helpful PM's from @mikegaiz and @Boatschool02.
To solve my excessive case length growth it was brought to my attention to use a piece of virgin brass to set my headspace.
And the light went on!!
Sorry about the long winded response but I just wanted to cover what I learned as it sounds like we had the same problem.
This happened to me as well while FF 6BRX. It looks like we are seeing a pattern develop. Excessive head space coupled with a hard primer. I primed 12 cases with Wolf SR-M primers last night. If I can get out of work while there is still sunlight, I'm going to give them a try.I had the same issues a couple of times when fireforming 6BRA cases with 20 grains of bullseye and 1/8 piece of toilet paper when I used BR4s. When I switched to Fed 205s or pistol primers I completely solved the problem.
My theory is when the case is not firmly held in place--like we get with a false shoulder or a jammed bullet, and we use a hard cup primer: the movement of case sometimes dissipates enough of the firing pin energy to prevent ignition.
When I was having issues I eventually did get all the FTF cases to fire by slamming the bolt closed and firing again. Some rounds need three attempts to fire. Again, a soft cup primer solved the issue.
Also, I have never had any FTF issues at all with fire formed cases and BR4s.
This happened to me as well while FF 6BRX. It looks like we are seeing a pattern develop. Excessive head space coupled with a hard primer. I primed 12 cases with Wolf SR-M primers last night. If I can get out of work while there is still sunlight, I'm going to give them a try.
Thanks,
Lloyd