Searching for any test results from SRP Small Flash Hole vs. SRP Large Flash Hole. Didn't see anything from a search. Anybody have any info ? Reason being Alpha SRP brass has the large flash hole. First time I've seen that combination.
Very helpful.Bill, not sure if this helps. A quote from Tom Danielson of Alpha
Thomas Danielson
May 4, 2020
"The smaller flash hole can present ignition problems in cold temperatures. We use the larger flash hole in our small primer brass for this reason. We saw better cold weather ignition with this setup."
Great infoFlash Hole Size
#53 = 0.0595”, works with the original 6BR & PPC flash holes, may be too small for cases like Lapua’s 308 Palma brass. I shoot that, uniform flash holes w/ K&M small primer tool @ 0.0625” or 1/16”. I also uniform flash holes to 1/16", but I use a Sinclair flash hole reamer; it makes it easy to...forum.accurateshooter.com
Searching for any test results from SRP Small Flash Hole vs. SRP Large Flash Hole. Didn't see anything from a search. Anybody have any info ? Reason being Alpha SRP brass has the large flash hole. First time I've seen that combination.
Yea, I had seen that post somewhere on here @GlennK. I feel good about trying the Alpha brass out in my 260AI.Bill,
I will resume my tests once our match season is over. I was able to get started in about as cold of temperatures as you could find. No size had any issues in the headstamped 6 BRA cases. Honestly the most impressed I was with the smallest I tried was on the coldest of the days. Lol
And my testing when finished, will only include 6 BRA cases. There's a lot for me do tackle, such as comparing them tuned on different powders/primers, of which none have been done yet. I had got just far enough to tell that h4895 would be competitive in the smallest AND the largest I tried so far.
Since that time @GlennK has shot 4 ibs 1,000 yard records with the srp large flash hole 6 BRA alpha brass, if that helps your confidence.
Tom
Having shot matches in temps down to 9ºF with .0625" primer flash holes, I don't worry about ignition with my Lapua SRP brass.Very helpful.