10mm reloads?

[m657]

any body looking to share amusing/embarrassing/helpful advise & sage commentary on this load??? looking for general plinking/moderate non-critical use recipes.

[scott1970]

For general plinking in the moderate range my favorite load is a 180 gr. fmj over 9.3 gr. of Longshot.

My first attempt with 10mm loads was with plated bullets. It was a disaster. They flew all over the place except for the target. I think the load was just too fast for plated. The fmj rounds stopped the problem. The amount of crimp had a big effect on accuracy as well. My groups would vary substantially based on the crimp. I found a happy place on the crimp die, and my loads have had very good accuracy in a total of eight 10mm handguns.

[m657]

thanks for mentioning that....what do you attribute such variance between plated/fmj??? and Longshot is never seen in my travels about the shire....I'm told up to about 1250 plated is good...

[fredj338]

The10mm loads like any other service caliber, even using the very same powders. You can go mild to wild with the 10mm, just stay with book data for longest brass life & limiting recoil damage to your guns.
For midrange loads, any of the medium burners from Unique thru HS6 works fine. For safe full power loads, powders from PowerPistol to aa#9 will work well. I like longshot for an all around powder choice, all bullet wts.

[scooter123]

Manufacturers of plated bullets have started offering Heavy Plate bullets in certain weights and types that are rated for velocities up to 1500 fps. With Berry's it's a Heavy Plate Concave Base, Extreme's Hollow Points feature a Heavy Plate in addition to a selection of Heavy Plate Concave Base bullets. RMR also offers some heavy plate bullets which I believe are Heavy Plate Concave Base bullets. BTW, all of the Concave Bases are simply a shallow depression that allows the Heavy Plate bullets to be visually identified. Since Rainier bullets commonly feature a Concave Base it's pretty important to keep the Rainier bullets in their own boxes because as far as I know the Rainiers are NOT heavy plate bullets.

As for that 1500 fps. velocity limit, you'll have to stoke a 110-125 grain 40 caliber bullet to the max to approach 1500 fps. out of a handgun barrel in 10mm. Run with bullets in the 155-180 grain range and it's doubtful you'll be able to get over 1350 fps.

[rwsmith]

Originally Posted by scooter123

Manufacturers of plated bullets have started offering Heavy Plate bullets in certain weights and types that are rated for velocities up to 1500 fps. With Berry's it's a Heavy Plate Concave Base, Extreme's Hollow Points feature a Heavy Plate in addition to a selection of Heavy Plate Concave Base bullets. RMR also offers some heavy plate bullets which I believe are Heavy Plate Concave Base bullets. BTW, all of the Concave Bases are simply a shallow depression that allows the Heavy Plate bullets to be visually identified. Since Rainier bullets commonly feature a Concave Base it's pretty important to keep the Rainier bullets in their own boxes because as far as I know the Rainiers are NOT heavy plate bullets.

As for that 1500 fps. velocity limit, you'll have to stoke a 110-125 grain 40 caliber bullet to the max to approach 1500 fps. out of a handgun barrel in 10mm. Run with bullets in the 155-180 grain range and it's doubtful you'll be able to get over 1350 fps.

They shoulda done this from the start to compete with jacketed bullets.

[epj]

I shoot plain lead in mine. Not trying to set any speed records though.

[papajohn428]

I'll push plated bullets to 1200 fps if it's a heavy-for-caliber bullet (.358/158, for example), but most plated bullets have fairly soft cores, which can deform at higher pressures. The plating may be stouter on some, and will withstand the higher velocity without issues, but the soft core can still distort and ruin accuracy.

Safety comes first, but I require accuracy too, and more velocity rarely helps much beyond a given point. Most of my loads run at 85-90% of maximum.

[Treeman]

10mm is pretty versatile. I tend to pair 800x with both cast(175/180) grain and jacketed(165gr and 180gr) bullets. Unique and a host of other pistol/shotgun powders give good results also.

[Calaveras Slim]

In 10MM, I prefer a heavy bullet at moderate velocities. 200gr with W231 or HP31. I like HS-6 also.

I see Xtreme bullets is offering a 220gr RNFP. Interesting but I guess if I decide to try them, to reduce the load for the 200's down about 20% and work back up.

Has anyone tried them???

[harley46580]

I use 7.0 grains HS6 under whatever 180gr bullet lead or jacketed I can get at the time. It's a good target load!

[colt_saa]

5.5 grains of 231 gives a nice mild load with a cast 170

Most all of my jacketed projectiles are pushed much closer to max

[shocker]

I like this one in my Glock 29 with storm lake barrel.
Penn Bullets 180 gr cast, 11.7 to 12 gr AA#9. This is step above 40 s&w and still comfortable to shoot. Or, 5 gr of #2 with same bullet for an indoor range load (power limited by club safety rules).

While many report otherwise, I had poor results with polygonal rifling and cast bullets. Hence the cut rifled barrel which works with cast and all loads in my experience.

[roninflag]

Whole lot of AA-9 and a 165 speer or 170 horn

[Maximumbob54]

I cast and powder coat the Lee TL401-175-SWC and load them over the load book's listing for AA #9. I'm not trying to max the load out or wear out my Colt Delta Elite. I'm guessing that load is less of a "real" 10mm to most and more like a .40SW +P. No matter, it's accurate, it's fun, it's easy on the brass (the Colt's wide open case mouth doesn't help any), and I am sure it would still hurt like heck to get thumped with one in the chest.

[m657]

Just waiting for components to show up....

And we just don't see any AA#products around here for years.

[fredj338]

Originally Posted by Calaveras Slim

In 10MM, I prefer a heavy bullet at moderate velocities. 200gr with W231 or HP31. I like HS-6 also.

I see Xtreme bullets is offering a 220gr RNFP. Interesting but I guess if I decide to try them, to reduce the load for the 200's down about 20% and work back up.

Has anyone tried them???

I just bought a box to work up some loads. I thought I would give a G20SF a try. I love my 1006, but it's a beast to pack around.

[ArchAngelCD]

For full power 10mm ammo HS-7 used to be THE powder but it's no longer available. Since then AA#7 and Longshot are the best choices for full power 10mm rounds. For practice and plinking ammo slightly faster powders will be a better choice like Universal, Unique, HS-6, AA#5, W231/HP-38 and the like.

For full power ammo since you said Longshot and Accurate powders aren't available you can give Blue Dot or 2400 a try.

[BLUEDOT37]

I've been playing with some different bullet/powder combinations in my 1076 & have been pleasantly surprised how well 2400 has performed, accuracy wise, in the 10mm. This pic is from my first outing.

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[fredj338]

Most 10mm pistols will group most any full power load into 3" or better @ 50ft. Some loads will do much better, like sub 1 1/2". 2400 works, but you give up vel & use more powder. HS7 was my fav, then was re formulated to be Longshot. So it is my fav now, but I have not tried aa#9.

[MajorDude]

Last September I was working on a load for my G20SF.
155 Gr. Rainier FP
7.3 Gr. Unique
W primers
COAL 1.255
I tried them over a Chrony and wasn't shooting for groups, but my note says, "seemed very accurate".
I got average velocity of 1,183 fps and my note says, "try a little hotter".
I had no functioning issues at all and brass is in good shape. I really like that gun and cartridge combination. I've read the plastic frame flexes to soak up recoil and believe that could be true.
Hope that helps!

[fredj338]

Originally Posted by MajorDude

Last September I was working on a load for my G20SF.
155 Gr. Rainier FP
7.3 Gr. Unique
W primers
COAL 1.255
I tried them over a Chrony and wasn't shooting for groups, but my note says, "seemed very accurate".
I got average velocity of 1,183 fps and my note says, "try a little hotter".
I had no functioning issues at all and brass is in good shape. I really like that gun and cartridge combination. I've read the plastic frame flexes to soak up recoil and believe that could be true.
Hope that helps!

Just a note, most plated bullets reach their accuracy limits at 1200fps or so. Much beyond that, accuracy starts to drop off. I've run plated in the 357sig to 1300fps with useful accuracy, but they shoot much better backing down to 1200-1250fps.

[m657]

as additional plus on the available powders [Universal, Unique, HS-6, AA#5, W231/HP-38, Blue Dot, 2400] is we will be able to use both auto & a S&W 610 for comparison!!!

Components still enroute.....

[Nitrous SSC]

Bumping this thread as I have the same question.

Current handload are 180gr Hornady xtp on 7.9gr Unique with a very light crimp.

From what I've read long shot is a good 10mm powder. I picked up 3lbs so I can have some fun with it. My plan is 180gr FMJ and starting at 9.3-9.7.

I found this for info. 180gr bullets over Longshot - 10mm-firearms.com

Also what lb recoil springs do you guys prefer? I'm running a 1076.

[fredj338]

Originally Posted by Calaveras Slim

In 10MM, I prefer a heavy bullet at moderate velocities. 200gr with W231 or HP31. I like HS-6 also.

I see Xtreme bullets is offering a 220gr RNFP. Interesting but I guess if I decide to try them, to reduce the load for the 200's down about 20% and work back up.
Has anyone tried them???

I've worked up loads with BD, LS, 800x & AA#9 & TG 220gr Xtrme. For me, best accuracy was with AA#9 at higher vel. LS, BD & 800x did well around 1000fps. Now to work up some loads with a 200gr wnfp.

[rwsmith]

Originally Posted by m657

thanks for mentioning that....what do you attribute such variance between plated/fmj??? and Longshot is never seen in my travels about the shire....I'm told up to about 1250 plated is good...

Many others say they lose accuracy with plated bullets. The plating may be too thin to be consistent as to how much lead and how much plating are in contact with the barrel. Also, if the plating flakes or distorts it could really throw off a bullet's flight. An FMJ is jacketed heavily enough that there will be nothing but guilding metal in contact with the barrel and unless it is a poor quality bullet, the jacket should stay in place.

[BLUEDOT37]

Originally Posted by Nitrous SSC

From what I've read long shot is a good 10mm powder. I picked up 3lbs so I can have some fun with it. My plan is 180gr FMJ and starting at 9.3-9.7.

Also what lb recoil springs do you guys prefer? I'm running a 1076.

I started using Longshot when Power Pistol became hard to find. Most manuals have them pretty close. I worked up to 9.5gr with a 180gr jacketed bullets (1.260" OAL). The Winchester FMJ 180s I tried were okay for the price but the Nosler JHP 180s are better, accuracy wise. Longshot flakes (actually flattened balls?) are pretty thin & are annoying sometimes the way they like to stick to the powder hopper & funnels. In my 1076 I got some good accuracy, surprisingly, using 2400, with the 180s. I'm using a 22# recoil spring.

PS: I worked up to 10.3gr with a 165gr JHP, but not with the 180gr, like the link references.

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