ccjcc81
Member
I recently posted a thread about taper crimping, and got some great advice from a lot of people about case trimming. %95 of the replies advise not to trim. A couple of other people replied that they like to trim to keep each round as close to the last as possible. One responder actually scared the heck out of me with a horror story involving disfigurement due to trim neglect. After reviewing all of the replies, plus some very, very lengthy googling and searching on other forums, I’m sad to say that I still don’t know what I want to do.
Please have patience with me. I understand that many of you have already answered my question once, and I hate to burden you again over the same issue. If I have offended you in any way with my pestilence, please read no further. If you’ve got the time, I’ve got a couple more questions for both camps.
First, the NO-TRIM’S (by no means a reference to your love-life, hahaha!) Many of the responses say to seat the bullet according to COL, then crimp to relieve the expanded bell of the shortest case. Does that mean that I have to dig through 1000 cases to find the shortest one?! Please advise.
For the DO-TRIMS: Do you trim your 9mm brass? Do you trim it all, or just some? Where do you draw the line? I’d like to throw some numbers at you and see what you think. My 9mm die set is still in the mail, but to get an idea of the brass I’m working with, I measured some samples of the brass pre-resizing. According to many of the posts I have read, re-sizing will actually shorten the brass more. I have about 1000 9mm cases. Of those, roughly 500 are PPU, 250 are Remington, and 250 are Winchester. I took 20 cases from each and the average lengths of each are as follows: PPU 0.749”, R-P 0.745”, Win 0.742”. These numbers are well below the minimum trim to length in my reloading manual. The shortest one I’ve found so far is 0.738”, which is 0.013 below my manual’s trim to length. That’s before resizing. So will that case even work? I have done endless forum searching for “what is the minimum case length for 9mm,” and the only answer I can find is “Don’t worry about it, load it and shoot it.” Can anyone tell me what the minimum safe case length is? And if I want to make all of my rounds as consistent as possible, will I have to trim them ALL to the length of the shortest case, even though it is shorter than the trim to length in my manual?
Thanks again very much guys.
Please have patience with me. I understand that many of you have already answered my question once, and I hate to burden you again over the same issue. If I have offended you in any way with my pestilence, please read no further. If you’ve got the time, I’ve got a couple more questions for both camps.
First, the NO-TRIM’S (by no means a reference to your love-life, hahaha!) Many of the responses say to seat the bullet according to COL, then crimp to relieve the expanded bell of the shortest case. Does that mean that I have to dig through 1000 cases to find the shortest one?! Please advise.
For the DO-TRIMS: Do you trim your 9mm brass? Do you trim it all, or just some? Where do you draw the line? I’d like to throw some numbers at you and see what you think. My 9mm die set is still in the mail, but to get an idea of the brass I’m working with, I measured some samples of the brass pre-resizing. According to many of the posts I have read, re-sizing will actually shorten the brass more. I have about 1000 9mm cases. Of those, roughly 500 are PPU, 250 are Remington, and 250 are Winchester. I took 20 cases from each and the average lengths of each are as follows: PPU 0.749”, R-P 0.745”, Win 0.742”. These numbers are well below the minimum trim to length in my reloading manual. The shortest one I’ve found so far is 0.738”, which is 0.013 below my manual’s trim to length. That’s before resizing. So will that case even work? I have done endless forum searching for “what is the minimum case length for 9mm,” and the only answer I can find is “Don’t worry about it, load it and shoot it.” Can anyone tell me what the minimum safe case length is? And if I want to make all of my rounds as consistent as possible, will I have to trim them ALL to the length of the shortest case, even though it is shorter than the trim to length in my manual?
Thanks again very much guys.