10mm Reloading Problem
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10mm Reloading Problem


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Old 12-04-2013, 03:12 AM   #1
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Default 10mm Reloading Problem

I'm fairly new to reloading but my 45 and 40 reloads are working great so far. I'm loading my 10mm pretty hot, cause that's the point of a 10mm, but they aren't as hot as the factory ammo from Underwood. I'm putting 9 grains of IMR 700x with 165 grain bullets.

Anyway, when I shoot them the end of the brass separates right around the base of the bullet. So I wind up with a little ring of brass at the end of the chamber that comes out easily with a cleaning brush. I reloaded some nickle plated casings and they aren't doing this. Most of the brass is from Underwood. I think the nickle plated are Remington. Someone suggested my bullets may be seated too deep but the OAL is just a hair under the length of the Underwood ammo. The powder is quite full in the casing so I'm wondering if a couple grains are getting between the bullet and the casing. Any ideas?
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Old 12-04-2013, 03:48 AM   #2
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What brand of bullet are you using? Using your calipers, what is the measurement of bullet diameter? What firearm are you firing your reloads from? What is your COAL?
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Old 12-04-2013, 03:50 AM   #3
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I finally dug up some 700-X load data for 10mm. Looks like I'm loading significantly hotter than recommended. I have shot some loads around 9.0 grains that didn't seperate though. I'm using an all steel EAA with a fully supported chamber. They state 6.4 grains as the max load. I guess I can try 8.0 gr.
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Old 12-04-2013, 03:55 AM   #4
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If they say 6.4 is max then it is MAX. Loading 8 (or even 9) grains is ill advised, some would say just plain stupid. The EAA Witness has a reputation for cracking frames in 10mm. Probably from people shooting overloaded ammo.
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Old 12-04-2013, 03:55 AM   #5
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Brad, did you even work up to that hot of load, or was that the starting grains to begin with?
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Old 12-04-2013, 03:56 AM   #6
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Very well could be. I'm away from my books so I can't browse through them. How did you get your data to load 9gr of 700x? You need some books man!
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Old 12-04-2013, 03:59 AM   #7
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In looking at the IMR published data they do not list 165 gr bullets and they do not list any loads for 700X. I would try a different powder and stick to the recommended loads
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Old 12-04-2013, 04:06 AM   #8
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Quote:
Originally Posted by NotMormon View Post
What brand of bullet are you using? Using your calipers, what is the measurement of bullet diameter? What firearm are you firing your reloads from? What is your COAL?
Ok, maybe I need some more tools. Just ordered a caliper. I'm not trimming the casings. And my bullet is supposed to be .400 obviously but I haven't used a caliper. The bullets shoot great in my .40 and I've shot some out of the 10mm before. Brand is FMP from Cabelas. Firing from an EAA Witness Stock.

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Old 12-04-2013, 04:07 AM   #9
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refer to post number 5
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Old 12-04-2013, 04:19 AM   #10
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Quote:
Originally Posted by Brad_CCW View Post
Ok, maybe I need some more tools. I'm not trimming the casings. And my bullet is supposed to be .400 obviously but I haven't used a caliper. The bullets shoot great in my .40 and I've shot some out of the 10mm before. Brand is FMP from Cabelas. Firing from an EAA Witness Stock.
I'm bustin your balls! You can't just wheely neely throw power into a case, smash a bullet in it and have sh!t go right.

You need some reloading manuals and you need to read them! Now, stop ef'n around and reload the correct way. You might just save all of your phalanges!
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