10mm and Longshot

849ACSO · January 2, 2016, 03:35 AM

So..........I recently went looking for some load data that I know I've seen before, but now I can't come up with it. Maybe someone could help me.

I am wanting to load 155gr Speer GDHP for 10mm Auto using Longshot. I seem to remember the starting load being around 10 grains. In the couple of manuals I've looked around in, there are no 155gr loads listed for Longshot.

I'm looking for a 1200-1300 fps load using the listed bullet and powder.

Cruising the interwebs, I'm seeing folks who are posting their load/chrono data for Longshot and 155XTP's, which I'm willing to use as a starting point, but I would like to hear some PUBLISHED numbers first.

Any help is appreciated. Thanks.

pctechdude · January 2, 2016, 11:39 AM

Start around 9.5, that is a max for the 180gr and is a safe place to start and work up. Use caution and look for pressure signs.

black mamba · January 2, 2016, 12:05 PM

Start at 9 gr. and somewhere around 10.5 should be between 1250 and 1300 fps.

T. O'Heir · January 2, 2016, 02:55 PM

There's one unverified load on Reloader's Nest using a Barnes XPB. MAX will be10.0.

Dave P · January 2, 2016, 04:33 PM

Uhm, if the vendor does not list it online, maybe it's not a very good load???

MarkGlazer · January 2, 2016, 04:54 PM

You can resolve your issue if you bump your bullet to 180 grains as published on Hodgons' web site. The 180 grain will get you into the velocity range you are seeking. They list their test bullet as Sierra JHC. You can probably achieve your desired velocity with any hollow point bullet, but as usually, start in the basement and work your way in .1 increments.

Hodgons' also provides data for a 200 grain bullet but it doesn't meet your velocity requirement.

By the way, nice choice in powder. I use Longshot exclusively for each of my 9mm semi-auto pistols.

Be safe. Have fun.

849ACSO · January 2, 2016, 04:56 PM

I started at 9. Went in .1 grain increments to 9.5, where accuracy at 15 yards was stellar. Stopped there, loaded 10 more and got out the chrono.

Virgin Starline Brass
Win SPP
1.25 OAL
9.5 grains Longshot
Speer 155gr GDHP

Kimber Target II - 5" barrel

Shooting Chrony Master - Measured 6' from the muzzle

Avg Velocity for 10 shots was 1348

Extreme spread was 62 FPS

Pretty happy right there. Thanks folks.

January 2, 2016, 03:35 AM	#1
849ACSO Senior Member Join Date: September 21, 2014 Location: Somewhere in the middle Posts: 629	10mm and Longshot So..........I recently went looking for some load data that I know I've seen before, but now I can't come up with it. Maybe someone could help me. I am wanting to load 155gr Speer GDHP for 10mm Auto using Longshot. I seem to remember the starting load being around 10 grains. In the couple of manuals I've looked around in, there are no 155gr loads listed for Longshot. I'm looking for a 1200-1300 fps load using the listed bullet and powder. Cruising the interwebs, I'm seeing folks who are posting their load/chrono data for Longshot and 155XTP's, which I'm willing to use as a starting point, but I would like to hear some PUBLISHED numbers first. Any help is appreciated. Thanks. __________________ "The day you stop learning SHOULD directly coincide with the day you stop breathing."

January 2, 2016, 02:55 PM	#4
T. O'Heir Senior Member Join Date: February 13, 2002 Location: Canada Posts: 12,453	There's one unverified load on Reloader's Nest using a Barnes XPB. MAX will be10.0. __________________ Spelling and grammar count!

January 2, 2016, 04:33 PM	#5
Dave P Senior Member Join Date: August 16, 1999 Location: North Florida Posts: 1,346	Uhm, if the vendor does not list it online, maybe it's not a very good load??? __________________ I think this country is screwed.

January 2, 2016, 04:54 PM	#6
MarkGlazer Senior Member Join Date: February 19, 2013 Location: Atlanta, Ga Posts: 329	You can resolve your issue if you bump your bullet to 180 grains as published on Hodgons' web site. The 180 grain will get you into the velocity range you are seeking. They list their test bullet as Sierra JHC. You can probably achieve your desired velocity with any hollow point bullet, but as usually, start in the basement and work your way in .1 increments. Hodgons' also provides data for a 200 grain bullet but it doesn't meet your velocity requirement. By the way, nice choice in powder. I use Longshot exclusively for each of my 9mm semi-auto pistols. Be safe. Have fun. __________________ non ministrari sed ministrare

January 2, 2016, 04:56 PM	#7
849ACSO Senior Member Join Date: September 21, 2014 Location: Somewhere in the middle Posts: 629	I started at 9. Went in .1 grain increments to 9.5, where accuracy at 15 yards was stellar. Stopped there, loaded 10 more and got out the chrono. Virgin Starline Brass Win SPP 1.25 OAL 9.5 grains Longshot Speer 155gr GDHP Kimber Target II - 5" barrel Shooting Chrony Master - Measured 6' from the muzzle Avg Velocity for 10 shots was 1348 Extreme spread was 62 FPS Pretty happy right there. Thanks folks. __________________ "The day you stop learning SHOULD directly coincide with the day you stop breathing."

January 2, 2016, 11:39 AM	#2
pctechdude Senior Member Join Date: March 5, 2013 Posts: 159	Start around 9.5, that is a max for the 180gr and is a safe place to start and work up. Use caution and look for pressure signs.

January 2, 2016, 12:05 PM	#3
black mamba Senior Member Join Date: September 13, 2011 Location: SW Florida Posts: 890	Start at 9 gr. and somewhere around 10.5 should be between 1250 and 1300 fps.