10mm gel tests

Retired Squid · January 04 2014 01:28:01 PM MST

I was going to load a few more today but things came up. Maybe tomorrow.

The_Shadow · January 04 2014 01:42:39 PM MST

Here is what IC got from the reworked COP 155gr All Copper HP's using 11.0gr's Power Pistol (Buffalo Bore load) 1422, 1435, 1456, 1413. Average = 1431.5 FPS/ 706 LBS. Really happy with this level of performance and would love to see them in gel!

Raggedyman · January 04 2014 06:19:38 PM MST

I have to admit I'm a little apprehensive about shooting them. We'll see how I feel after working up a little higher with 155 gr TAC-XPs.

The_Shadow · January 04 2014 06:53:48 PM MST

Buffalo Bore swears theirs is inside the SAAMI MAP as loaded...I'm still trying to get out to the shooting range.

Geeman · January 04 2014 07:15:38 PM MST

According to Quickload they are correct. Right at the max, but not over.

Greg

The_Shadow · January 04 2014 07:56:06 PM MST

Hey post a screen shot or send it to me and I'll post it of the 11.0 grain Power Pistol load and 155 Barnes TAC-XP.
It would be nice to view the pressure profile! ${$default_cool_smiley}$

Geeman · January 04 2014 10:24:09 PM MST

Quote from: The_Shadow on January 04 2014 07:56:06 PM MST
Hey post a screen shot or send it to me and I'll post it of the 11.0 grain Power Pistol load and 155 Barnes TAC-XP.
It would be nice to view the pressure profile! ${$default_cool_smiley}$

I emailed the quickload info. I made the mistake of thinking of a lead bullet. The Gold Dot 155g looked great.

I don't know how they could squeeze 11g of power pistol under that copper slug. Pressures are showing way high and a 72% compressed charge. You guys can play with that one, I'll watch from a distance ${$default_grin_smiley}$

Greg

Intercooler · January 05 2014 04:25:24 AM MST

The COP version should be less compressed due to a shorter bullet. I think ${$default_huh_smiley}$

Geeman · January 05 2014 06:29:52 AM MST

Copper is less dense than lead, which leads to a bigger volume to get the same weight.

Quickload shows the Gold Dot at .540" length.

Barnes shows .732" length.

Was one of these actually torn down to get powder type and weight?

Retired Squid · January 05 2014 06:47:14 AM MST

Since I don't have $400 guns to test handloads with I think I'll join Geeman also. I do know with the Barns all copper HP the bullet is too long to get more then what I was using (about IIRC 7g PP) and seat bullet reep enough to allow them to properly fit into magazine. Due to their wide mouth they have to seat deeper in the case to fit in the magazine's and that don't leave a lot of room because the Barn's 140g HP is longer then my Hornady 180 and maybe tad longer then the 200gr but don't have any of those loose to measure to be sure.

On the up side I went to gun show yesterday and bought two boxes of 100 each new Starline NP brass for $28 total and that's about half of what the last batch cost me from Mid-Way USA. Too bad that was all he had, but hey that more then replaces brass lost over the last couple years in the grass at the range. ${$default_grin_smiley}$

Intercooler · January 05 2014 07:09:53 AM MST

Both pull-downs are in there. The COP bullets are shorter according to the data.

Geeman · January 05 2014 08:08:37 AM MST

Quote from: Intercooler on January 05 2014 07:09:53 AM MST
Both pull-downs are in there. The COP bullets are shorter according to the data.

Ok, I looked. You guys have put together one heck of a resource here. I think we all owe a big thank you to shadow, intercooler, and raggedyman for the work you have done. THANK YOU!!!!

I found the Gold Dot 155g in the Georgia arms load and it shows a length of .5505"

The tear down of the BB 155g TAC-XP shows a length of .7340".

http://10mm-firearms.com/factory-10mm-ammo-pull-downs/buffalo-bore-barnes-155gr-tac-xp-pull-down/

I need to stop posting half cocked and not understanding exactly what the subject matter is.

I plugged in the exact info into Quickload for the BB load and it shows max pressure of 147,750 PSI and a 68% compressed load. That big pellet of powder from shadow's tear down supports that high of a compression. It also show a velocity of 1850 fps out of a 5" barrel.

I think its certain that that pellet of powder isn't burning in a traditional sense, and the Quickload data is not going to work out because of it. I think its more like a progressive burn like a rocket would have, where the powder mass is carried down the bore and burning toward the core.

I'm not going to try to play with this type of loading. The difference between running a standard primer and a magnum primer is uncharted territory and if anyone is going to try and duplicate it, be very, very careful.

Greg

I added the screen shots from Greg to his post... The Shadow

The_Shadow · January 05 2014 09:05:53 AM MST

Yes it was compressed so much I had to chip it out of the casing as you can see the tightly packed pellet that came out. I broke that up before reloading it back for testing. IC has tested the COP that I matched to BB specs. using PP from my supply and the data matches BB performance.

Geeman, For some reason the pictures didn't come through for the screen shots.

4949shooter · January 05 2014 09:11:13 AM MST

Quote from: Raggedyman on November 26 2013 04:05:25 PM MST

Wow....that Norma load really penetrated. It rocked the gel too!

I would like to come to your range to do some coyote hunting. ${$default_cool_smiley}$

Geeman · January 05 2014 09:56:28 AM MST

Quote from: The_Shadow on January 05 2014 09:05:53 AM MST
Geeman, For some reason the pictures didn't come through for the screen shots.

I tried forwarding in a word doc this time. Let me know if you don't get it.

Greg