If you want a more accurate powder charge.. run 4 (or more) thru the press..dump the powder from them onto the scale, divide by 4 (or whatever you used).. you'll probably be out at least .1 gr from what you thought you were throwing..
Stovepiping
- Thread starter xman111
- Start date
(in response to John's post) It's just semantics at this point. I agree that if you're flaring a case, you need to tighten the mouth back up to ensure proper chambering, but I don't personally consider the end product a "crimped cartridge". My revolver rounds are crimped, my semi-auto rounds are not, even if I run them through a Lee FCD. That said, I've never felt the need to flare 9mm cases, and therefore never felt the need to "crimp" them.
I still don't see how this relates to stovepiping. Once the primer is struck and the bullet propelled out of the barrel, the case expands until it meets the chamber walls. Only then does extraction begin, and at this point, the degree to which the case was crimped is irrelevant. If I'm missing something, feel free to enlighten me.
I still don't see how this relates to stovepiping. Once the primer is struck and the bullet propelled out of the barrel, the case expands until it meets the chamber walls. Only then does extraction begin, and at this point, the degree to which the case was crimped is irrelevant. If I'm missing something, feel free to enlighten me.
- Location
- Prince George B.C.
I was having extraction/ejection problems with a 9mm. One of the issues ended up being I didn't have enough crimp. As the fired case was coming out it was catching on the leading edge of the next cartridge in the magazine. It would cause it to flip around and stovepipe.
I tightened my crimp a tad and and most of my problem went away.
John
I tightened my crimp a tad and and most of my problem went away.
John
+1 - given the shape that 9mm brass sometimes ends up when you seat a bullet a Lee Factory Crimp is almost a necessity. NOT crimping 9mm can cause very severe problems if the bullet sets back into the (already small) case on feeding. Pressures as high as 60,000 cup have been measured with bullets set back in 9mm cases.
- Location
- Calgary Ab
I also believe that a slight crimp can be a plus.The case will hold onto the bullet a touch longer and give you a better and more consistent burn on your powder.
A better burn will mean more power for your slide to cycle .( throw the brass further )
If you like the lite loads you could always lighten up the recoil spring.
My 2 cents.
A better burn will mean more power for your slide to cycle .( throw the brass further )
If you like the lite loads you could always lighten up the recoil spring.
My 2 cents.
I zero the scale with the casing and primer on it so when I put the powder in, the only thing that gets weighed is the powder.
Worked great, no stovepipe, a little more kickback, looks like problem solved. Now I think i will make 100 for next weekend.
Worked great, no stovepipe, a little more kickback, looks like problem solved. Now I think i will make 100 for next weekend.
- Location
- Prince George B.C.
The weight of the cases is irrelevant.
Put the case on the scale.
Zero the scale
The case now weighs zero for the purposes of measuring the charge.
All my loads for IDPA and IPSC are measured this way. We are not talking pinpoint long range accuracy here
Zero issues.
John
- Location
- Prince George B.C.
