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Joined: Jul 2003
Posts: 437
Campfire Member
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OP
Campfire Member
Joined: Jul 2003
Posts: 437 |
I don't know if this is common or not. I bought 280 brass, loaded it up, shot to fireform to ackley. I trimmed all cases to spec before loading so after firing and forming the brass went from 2.54 to 2.515.
I contacted the gunsmith, he said it was ok, and that the cases will stretch with more shots. Is this true? This is my first time fire forming so I don't know what to expect. Gunsmith also said I can trim them a little shorter?
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Joined: Jun 2007
Posts: 29,786
Campfire Ranger
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Campfire Ranger
Joined: Jun 2007
Posts: 29,786 |
AI did the same for me, you will not have to worry about trimming for a while.....after you true them up, just go shoot.
These are my opinions, feel free to disagree.
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Joined: Feb 2004
Posts: 2,098
Campfire Regular
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Campfire Regular
Joined: Feb 2004
Posts: 2,098 |
Quite normal, nothing to worry about.Rick.
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Joined: Mar 2011
Posts: 1,035
Campfire Regular
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Campfire Regular
Joined: Mar 2011
Posts: 1,035 |
Normal. Go shoot and enjoy not trimming.
Enough already, just shoot it!
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Joined: Oct 2000
Posts: 30,286
Campfire 'Bwana
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Campfire 'Bwana
Joined: Oct 2000
Posts: 30,286 |
Not trimming? Hmm, I'm trying to see a problem here... 
“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery
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Joined: Feb 2001
Posts: 4,085
Campfire Tracker
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Campfire Tracker
Joined: Feb 2001
Posts: 4,085 |
Why did you trim them before initial shooting?
Ted
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Joined: Apr 2010
Posts: 1,702
Campfire Regular
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Campfire Regular
Joined: Apr 2010
Posts: 1,702 |
Don't trim any cases until they get over maximum trim length. I know you probably wanted to trim them all to a uniform length, but I haven't noticed a difference in accuracy in cases with varying lengths, so I just trim them when they get too long now.
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Joined: Jan 2010
Posts: 8,021 Likes: 2
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2010
Posts: 8,021 Likes: 2 |
There is also nothing wrong with coming up with your own trim lenght based on your brass and what they are now. You could just go slightly longer than the shortest one, and trim them all uniform. Then if you are crimping or seating to a cannelure, they will all match. All long as you are not over the max case length for your chamber, they will be fine. The tiny difference in amount of neck grip or whatever means nothing.
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Joined: Aug 2009
Posts: 2,794
Campfire Regular
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Campfire Regular
Joined: Aug 2009
Posts: 2,794 |
Of course they're gonna get shorter. Blowing out the shoulders has got to change something. If you were pushing the shoulders in, it'd make the brass longer. Usually when you 1X any brass it will come out shorter.
And I agree that it's pointless to trim brass-any brass- before fire forming it.
Aim for the exit hole.
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Joined: Jul 2003
Posts: 437
Campfire Member
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OP
Campfire Member
Joined: Jul 2003
Posts: 437 |
Thanks everyone
I would say there is definitely a consensus that it's normal.
The trimming was because I started with 280 brass, wanted them uniform, didn't know that it didn't matter because the case was going to shorten. I'm learning. New to the fire forming world.
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