The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Wildcats And Their Development Case length with AIGo | New | Find | Notify | Tools | Reply | |
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I've heard that the cases after fire forming for AI shorten. I witnessed it my self with the 100 I fire formed for the 6.5/06 AI. I was just wondering, does anyone do anything to prevent the cases from being to far under the trim length? Do you trim the new brass just under max so when you fire form, you don't get too short? How short is too short anyways?  I started my first batch by trimming after necking down to the 6.5/06 trim length. Most of my cases came back about .005 under but some where .010 under. I've been through this batch 3 times now and most still haven’t got back to the trim length yet. Less work I guess. What’s your experience? ------------------------------- Too many people........ | ||
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If your cases are shortening upon fireforming, that is an indication that you are indeed doing it correctly, otherwise the case would be stretching. Leaving the case @ maximum length before fireforming would indeed be a good idea. I don't concern myself with the cases being a bit short. As you will find, Ackley Improved cases stretch very little upon repeated reloading, leading to less working of the brass and therefore longer case life. (one of the main advantages) Just go ahead and enjoy these benifits.  GOOGLE HOTLINK FIX FOR BLOCKED PHOTOBUCKET IMAGES https://chrome.google.com/webs...inkfix=1516144253810 | |||
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I DO NOT trim the cases until AFTER a good fireform. Once the case grows all it needs to,..then trim it. You will lose very little in the forming and have no need to worry about the case length on new untrimmed brass. My theory is that until each case conforms to the chamber,..the trimming is not necessary. Once they are all uniform in internal volume,..then trim them to a uniform length. I do this in standard chambers with new brass as well. Difficulty is inevitable Misery is optional | |||
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I seem to remember that after I necked down from 270, there was one hell of a long neck. I had to trim. What I'm asking I guess is, should I've just trimmed to .002 of max and then completed the process, then trimmed to length? I think I have my answer anyways. Thanks. ------------------------------- Too many people........ | |||
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the 270 is a longer case,..so that may have given you the long necks. If they chamber, then I would go ahead with it and inspect a few fired cases for neck crimping or shiny "rub" spots on the mouth where it was forced against the leade rifling. I neck up or down with 25-06 or 30-06 because of the correct neck length from the parent cartridge. HTH Difficulty is inevitable Misery is optional | |||
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Trimming is a breeze with the 3-way trimmer. I'll just trim within .002 and see how it goes on the next batch of brass. I beat this batch up pretty bad with the velocities I was getting. I'm starting to get a lot of flyers and primers seem to be going in with little resistance. I have backed it down under 3200 fps for those 120 TSX and am getting good accuracy. My hunting partner blew it though. He lost his licence and can't get up to hunt so I guess the pressure is off on getting his rifle all dialed in.  ------------------------------- Too many people........ | |||
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swap cases soon and start over with your accuracy loads. No need in going into hunting season with loose pockets. And if the new cases don't hit the leade,..then just trim the the few .001's to make them uniform and go for it. But I don't waste time trimming before I fireform them. Difficulty is inevitable Misery is optional | |||
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