10mm Mihec 220 gr load

[Wadestep]

So, I have finally got around to using my new MP molds 10mm, 220 gr beauty. And I will say it is my 4th Mihec mold and 8th overall and maybe my favorite. I got about 80% keepers and fast. Anyway, I am now wanting to load some, and there's no data out there for 220 gr lead SWC. I have basically longshot to use for powder (also have universal and 2400).
Longshot data that I collected from various internet sources as MAX loads (note - probably above book!):
180 gr XTP up to 9.6-9.8 gr
200 gr XTP up to 9.4 gr
I'd probably stop well shy of those - I don't need nuclear loads.

From this website, 215-220 gr boolit, 1240 fps, 750 ft-lbs, COL 1.2585, longshot 8.6 gr.

I'd like to put together a bunch of lower-power loads, and also some high-power hunting loads (black bear and hogs to 300+lbs if possible, at least comfortable with 150 lb deer and 200 lb hogs as a minimum).

My plan then is to start around 8.0 grains longshot and work up to 8.6 grains. One issue is that depending on which HP I use I get 115 gr, 120 gr, and 125 gr boolits. I'd like to stop at the max safe level for the heaviest boolits - ie 1 load for all weights.

This is the first time I've loaded 'off the books', so I'm hoping to learn from some of the wealth of experience that's out there.
Thanks for the advice.

[BK7saum]

Tag for later. I have loaded and shot some of the NOE 200 grain boolits and will be loading the MP 220 HP boolits next. Also using longshot, just need to work up some loads now.

What pistol are you loading for? I'm using a Glock 40 10mm.

Brad

[Wadestep]

I'm loading for a glock 20 with a 22# spring and a stock-length KKM barrel. I go hunting/camping and use it as my 'everything handgun' - 2 legs, 4 legs, protection, hunting, plinking, beat-around gun.
wade

[fredj338]

I gave some Extreme 220gr a try with Longshot, 800x, BlueDot & AA#9. My best accuracy & vel was with AA#9. I dropped back to a 200gr, just seems diminishing returns with the heavier bullet, more recoil, not quite as accurate. In solid form, I don't think you get much more penetration than a 200gr WNFP, jmo. This is my bullet from Accurate. I can post some 220gr data when I get home to my loading book, but 1150fps is possible in a stock G20, add 50fps with another 1" of bbl.

[Wadestep]

Any load data you have would be appreciated. My books don't have it. 1150 fps would be perfect - I'm looking for 1100 or greater for the top load.

[seaboltm]

I found a load for Blue Dot using this mold. I settled on 8.3 grains of BD but I have not fired the load yet. Comments?

[seaboltm]

My internet search listed this information for 220 grain 10mm data:

G20/6" Jarvis, expect 75 -100 fps less for each1" loss of barrel, i.e. G20 stock bbl., G29.
10 grains of Blue Dot for 1307 fps
8 grains of Power Pistol for 1243 fps
12.4 grains Steel for 1318 fps
11.2 grains 2400 for 1102 fps.

Heavy 10mm 1
IMR 800X 7.0 grains
OAL = 1.280" +/- 0.010
Min. speed:921.2
Max. speed:1012
Average speed:979.8
Standard Deviation:24.92

Heavy 10mm 2
Blue Dot 8.0 grains
OAL = 1.261-1.270
Min. speed:914.2
Max. speed:997.8
Average speed:952.0
Standard Deviation:26.49

Heavy 10mm 3
Accurate #9 9.0 grains
OAL = 1.280-1.287
Min. speed:807.2
Max. speed:951.7
Average speed:872.0
Standard Deviation:38.84

Heavy 10mm 4
Accurate #9 9.0 grains
OAL = 1.263-1.275
Min. speed:857.9
Max. speed:923.4
Average speed:893.3
Standard Deviation:22.04

Heavy 10mm 5
Accurate #9 9.5 grains
OAL = 1.263-1.277
Min. speed:893.5
Max. speed:969.1
Average speed:936.4
Standard Deviation:24.79

Heavy 10mm 6
Accurate #9 10.0 grains
OAL = 1.264-1.277
Min. speed:956
Max. speed:1022
Average speed:980.8
Standard Deviation:22.37

Heavy 10mm #7
Alliant Blue Dot 8.2 gr.
CCI #300 Large Pistol primer
OAL = 1.261-1.270 in.
Gun: S&W 610, 6.5” bbl.
Average MV = 1024.5 ft/s
Std. Dev. = 26.2 ft/s

Heavy 10mm #8
Alliant Blue Dot 8.4 gr.
CCI #300 Large Pistol primer
OAL = 1.261-1.270 in.

Gun: S&W 610, 6.5” bbl.
Average MV = 1035 ft/s
Std. Dev. = 27.1 ft/s

Gun: Glock 20 SF, 4.6” bbl.
Average MV = 993.7 ft/s
Std. Dev. = 24.0 ft/s

Heavy 10mm #9
Alliant Blue Dot 8.6 gr.
CCI #300 Large Pistol primer
OAL = 1.261-1.270 in.

Gun: S&W 610, 6.5” bbl.
Average MV = 1057.7 ft/s
Std. Dev. = 18.4 ft/s

Gun: Glock 20 SF, 4.6” bbl.
Average MV = 1029.4 ft/s
Std. Dev. = 17.5 ft/s

Heavy 10mm #10
Accurate #9 9.0 gr.
Federal #155 Magnum Large Pistol primer
OAL = 1.261-1.270 in.

Gun: S&W 610, 6.5” bbl.
Average MV = 939.5 ft/s(Same load averaged 893.3 ft/s with CCI #300 standard Large Pistol primers.)
Std. Dev. = 29.1 ft/s

Gun: Glock 20 SF, 4.6” bbl.
Average MV = 879.7 ft/s
Std. Dev. = 12.3 ft/s

[Wadestep]

Thanks for the research - I hadn't seen that 11.2 gr of 2400. Unfortunately I don't have any of those other powders at hand.

[NavyVet1959]

[Wadestep]

wow, that' smoking fast for 215 gr. I've loaded some with 8.0, 8.4, and 8.6 gr longshot - 8 each, hand-weighed. Sounds like I'd better be pretty careful with the 8.6gr. Think I'll finish off with some more 8.0 and 8.2 gr and test them out. The bullets weigh up to 225 gr.
Thanks for the help, everyone. It will be a couple weeks until I get to shoot them, but I'll report back.

[BK7saum]

What platform are you shooting these in. They look to be seated too far out for a semiautomatic and doesn't look like it would pass the plunck test in my glock.

[NavyVet1959]

What platform are you shooting these in. They look to be seated too far out for a semiautomatic and doesn't look like it would pass the plunck test in my glock.

G20, G29, and RIA 10mm M1911. Stock barrels on all of them.

This is using .40SW brass, but loaded to 10mm length. As such, they are headspacing on the extractor. I knew that the Glocks would not have a problem with this, but I was surprised that the 1911 did not seem to have a problem with it either. They are loaded at max OAL for the 10mm.

[BK7saum]

Thanks for the clarification. I should've picked up on that fact. I've looked into that with my glock but using lubed boolits, the lube groove is in the wrong location to use 40 brass full length.

[NavyVet1959]

Thanks for the clarification. I should've picked up on that fact. I've looked into that with my glock but using lubed boolits, the lube groove is in the wrong location to use 40 brass full length.

I've done it with the Lee tumble lube bullets. I'll admit though, it might look strange with a traditional lube groove if it was exposed outside the brass, even if you were using the alox (tumble lube) on it.

I have plenty of 10mm brass, but since the .40SW brass works well enough for me, I use it whenever possible.

[fredj338]

Something to consider. I am pretty sure current 40 brass is thinner in the head than 10mm. I wouldn't to be maxing out 40 brass & also putting all the strain on the extractor alone. Just a thought.