Most people? You have taken a poll? Lol
6.5 Creedmoor.......Large or Small primer pocket???
- Thread starter BowChamp
- Start date
JMAN80
Gold $$ Contributor
Let me clarify….. Most of the people i shoot with via prs guys / long range “ hobbyist” tend to use them as they work well and are much easier to come by in this day and age.
Understood. Most of the guys I shoot with in PRS and local shooters use LRP myself included.
That surprises me on the br-4’s for the Creedmoor, I didn’t think they would spend the extra $ for them.
JMAN80
Gold $$ Contributor
They are me. Lol
JMAN80
Gold $$ Contributor
If I had a pile of LRP I’d run them…. Just hard to come by is all.
White Eagle
Silver $$ Contributor
I have done side by side tests over a chronograph with small and large rifle primes in cases of the same make and powder and bullet weights and found the srp had higher velocities than lrp did
Did you measure the internal volume of the cases and compared them?
JMAN80
Gold $$ Contributor
This is a slippery slope. Lol
Steve Donlon
Gold $$ Contributor
Like our member Laurie said was that there are so many variables you could get different results with different combinations of powder, primers and brass, barrels, conditions to name a few. What ever works for you amigo.
Not saying to do it as a usual thing as I don't but if he is comparing SRP to LRP brass and coming to a conclusion it's just the primer with all else being equal then he needs to measure the case volume as it does have an impact on the velocities with all else being equal.
I'd be Curious to see, the Results between, SRP and LRP with, the EXACT, SAME, Rifle Bbl, Bullet used, Cases & BEST Load, "Work Up", etc. THEN Doing,,.. 10 Shot Group's at,. 200 or, 300 Yds.
I'd bet, the Group Difference is,.. just, a tiny, TINY,.. Bit, smaller with, the SRP's
I'd bet, the Group Difference is,.. just, a tiny, TINY,.. Bit, smaller with, the SRP's
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https://www.targetshooter.co.uk/?p=2621
........... but then, in 7mm-08 and with a different powder, the opposite.
https://www.targetshooter.co.uk/?p=3683
Until you try, you don't know.
White Eagle
Silver $$ Contributor
did no mess around with that
just an old fashioned test with readily available components that anyone can buy and with no other tools than the cases mentioned
a side by side comparison with a chronograph that is it
dig in to the details if you want that is the way I did it
did not check the barometric pressure, earth rotation, or the position of the sun
It’s not something you need special tools for but if you are going to come to the conclusion the primers were the difference in velocity then you need to know all the other variables are the same. Case volume can have a big influence. Go test Winchester brass against LC with the same load.
White Eagle
Silver $$ Contributor
why
Why? Because you came to a conclusion that the SRP gave you more velocity with everything the same than the LRP but unless you know if the internal capacity is the same in the SRP brass and LRP brass that whole test and conclusion are not factual that it’s the primer. Could be the brass.
Also what was the difference in the speed between the two?
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