I tend to use Winchester, Remington or CCI primers in my 9mm and 40 S&W loads since the Federal primers flatten at much lower pressures. I reserve the Federal primers for my light revover loads since all of my revolvers have lightened DA triggers.
Flattened primers - can't figure why
- Thread starter RTMiller
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gamestalker
member
Friendly Don't Fire has a good approach to future diagnosis. It was my chrony that raised a red flag with my mistake a few weeks ago, with 9mm none the less. Knowning your velocities is so very useful.
tightgroup tiger
Member
I have to dis-agree with most of you. There is a problem with "bullet setback" It is when a bullet creeps back into the shell further then it is supposed to due to recoil and brass wall thickness being to thin to adaquitly support the bullet. COL is usually case overall length. It should be .750 on a 9mm. OAL is over all length with the bullet in the case. It should be 1.125" and no shorter. If the bullet creeps back into the shell case it will build unbelieveable pressures. Loading an OAL of 1.095 is way to short and is simulating "bullet setback". I am afraid you will blow up your gun loading your shells at this length. Seat your bullet at 1.125" and (I am assuming you are talking about 9mm luger) to 1.125 and check your primers then. You will see a difference in recoil and primer flattening. I would try loading them at at this length and inspecting the results before shooting any more of the short loads reguardless of the powder charge.
rfwobbly
Member
They are not "recommending" so much as they are reporting what they used and the pressures they achieved when they used that measure of powder at that OAL. If your barrel/chamber/bullet shape allow, then you can always use a longer OAL.
This is true, but only if you begin at the "starting load" and work your way up. There are too many variables at work in any firearm to simply start at the max load with similar components and expect good things to happen. I know you know this. I greatly respect your input. I say this for the benefit of beginning reloaders.
All the best.
rfwobbly
Member
Mr Miller -
I started in the Hornady #3 which gives 124gr 9x19 with W231 at 3.9 to 5.2gr using 1.040 or longer. I also rely on Winchester #15 which gives W231 from 4.2 to 4.5gr at no specific OAL. Even Lyman #49 gives 3.9 to 4.4gr at 1.075" or longer for W231.
If there is no danger of engaging the rifling, then I'd certainly be using a longer OAL.
With my load I'm achieving just at 1030fps.
Hope this helps!
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