EAA Witness...10mm

for hot (9mm and 10mm) loads Power pistol is the best and it measures accurately in my AutoDisk too :)

btw I usually weigh 3-4 cases per box to make sure the charge is the same. I only crimp with use Lee dies seating dies they seems to do a pretty good job.

agree about factory ammo being mild; factory .44mag is only 750-1000ft-lbs I can load safely up to 1400ft-lb of energy :cool:
 
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First of all the gun performs quite good with factory ammo I went through 3 boxes.

50 rounds of American Eagle(180 gr lead cast) went through without a hiccup.

100 rounds of UMC(180 FMJ) I had about 5 FTF,(most of which was when I was using 20# Wolf Spring) when I used the 18# I had no jams.

I did run through 50 rounds of reloads and this is where I had some problems.

First the load..

200gr Horn XTP
Federal Brass(I have Starline on the way)
11.3gr of Accurate#9
CCI 350
1.255 OAL
.420 Crimp using LEE Factory Crimp Die

I was using a Wolf 20# spring.

I found that I was getting a fair bit of powder residue(some of it unburnt). After about 5 shots I would have some built up in the chamber/barrel and it would start leaving small dents(like dimples) on my cases.

I cleaned out the fouling after 5 rounds and all the rounds fired off with no malfunctions.

My cases were coming out normal except for a slight flattening of the primer. There are no splits or any smoke around the primer. So I am assuming that the primer flattening is happening when the case is striking the breech face?

Is Accurate#9 a dirty powder?

Is the powder charge too light?

Or maybe not enough crimp?

I measured my chamber and it is on the sloppy side....(.430) is the measurement. Not sure what the SAAMI spec is for chamber sizes? I am guessing around .427?
 
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