10mm Load help....

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jeeptim

jeeptim

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How we doing?
So just got a Glock 20 10mm.
Took it out today for the first time good and bad.
The good.....
At 5yds ish.
Factory ammo.. Sig 180gr fmjs.
Mal 1250 ft/sec
624 ft-lbs
Dead nutz really impressed.
My Reloads..
Cases A-USA I know but that's all I had.
Bullets..Rainier 180gr rnfp.
Powder...unique 7gr.
CCI. LPMP
COL. 1.256 same as the factory rnds. Same shape bullet as well.
Had 3 light primer strikes none with factory all passed plunk test. It may have had something to due with the weather it was 27° this morning at the range
Performance was awful...
The only other straight wall cases I load are colt 45 they rock.
Think I just need a better recipie.
As of now I just received 500 starline cases.
I use only use CCI mag primers.
And powder I currently have that may work is.
Unique.
Bullseye.
Hero.
H-110.
Lil gun.
Looking for trusted data for better accuracy.
Mine were/Are embarrassingly bad.
The worst I have ever made.
In my defence that Sig ammo was $35.00 a box I was excited to shoot so I picked some load data from the Hornady book and ran with it.
Thank God I only made 100 I usually do no less then 500 at a time but had no brass.
So if you could point me in the right direction I would greatly appreciate it.
 
If a-usa is armscorp I'd throw it out. Ive had 2 blow up in guns with bvac ammo running way under max while shooting through a chrono. Not reloads.
I use blue dot for my full power loads and unique for my plinking cast loads. I use 99% WLP primers in large pistol. Never had an issue with any 10mm in any of 6 or brands of guns. It's possible u should remove your firing pin and clean the channel. Ive read about new guns having light strikes from that. Out of all my glocks ive never experienced it though. Now cosmoline.... I have fought with in some surplus guns. Also with some bullet profiles I have had to shorten c.o.l. to get good feeding.
 
Cowboy
Thank you!!!
Yep have 50 or so reloads left from the range with a USA brass will pull those.
And the new gun has a good amount of copper looking grease removed most but not all and being as cold as it was this morning we will call it that.
But some accurate load data is what I am really after.
Thanx
 
I use Longshot, 9.3 grains with 180 grain jhp from zero bullets, had light strike problems with my G40 when I first got it, took firing pin out and cleaned everything with rubbing alcohol and never had one again
 
Stew..
Good info thank you!
I have long shot on my list of things to buy next month when the gun show comes to town.
Here in .ca. where I live to go th LGS a lb of powder runs $35.00 to $40.00
At the gun show $23.00 So gotta wait.
Thank you for the info.
 
40 bucks a lb. Wow. Gander and cabelas are 25-30 ish here. Gun stores average 20-25. I seen Clay's today for 13.99 a lb.

I don't like to give load data because I recently bought a 44 mag that for whatever reason shoots faster and shows pressure signs all the way up to dangerous with loads that are well under my normal loads. I used to not care.

That said, and I don't recommend anyone using any handload ever just like every manufacturer don't. Lol. ..... my go to accurate plinking load in my 20/29/delta/and 220 is 10.2 grains of blue dot. Which is .5 under max in my hornady manual. Averages 1220 in my g20. And 1050 in my 29 with a 180 xtp.
 
I'd suggest AA#9 for full power loads at the 180+ weights. Meters better than Blue Dot, and is less flashy. Longshot is another top performer.

Good move going to Starline cases. I love them.

Magnum primers are unnecessary for most 10mm loads. Those may have harder cups that your striker isn't quite up too popping. But be sure that you are getting a good, deep seat on them... incompletely seated primers are usually the cause of light strikes in handloaded ammo.
 
I use winchester primers (I can always buy at walmart..... it's handy) so there is no choice on mag or standard. Ive used tens of thousands though with no problem. Cci magnums may be harder. I have a lot of loads for 10mm from weak to heavy. From BD to AA 9 power pistol, and 800x to light unique loads. Ive gotten less standard deviation from blue dot. It's not my favorite powder but it's the most accurate I've found. Ive never used long shot. I may try it someday.
Hornady and starline are what most of my brass consists of. But I really have no preference as long as it's not armscorp. Fool me twice as they say......
 
jeeptim said:
How we doing? So just got a Glock 20 10mm.
Bullets.. Rainier 180gr RNFP
Performance was awful...
Click to expand...

• Plated bullets are not going to perform well until the plating gets VERY thick, like a Gold Dot. Plated bullets are fun, they loaded easily, and they are cleaner to shoot, but the thinly plated ones are simply not that accurate. Go ahead and order some real jacketed bullets (even blems) from RMR.
• Like 40S&W, your middle weight bullets (155 & 165gr) are going to give better results.
• Unique is known not to meter that well. Try a modern powder that's designed to meter better, like BE-86, AA No7, AA No9, Sport Pistol, or HS-6.
 
All Winchester LP primers for me. I like xtreme 180gr hp & fp. AA#9, blue dot, long shot are my faves. Absolutely hate 800x
Corn flake size grains meter inaccurately. Also shot some sr4756 with good results.
 
Blue Dot for range use and 800 X under a 200gr XTP for field carry. You can really get a 200 gr bullet moving with 800X

I weigh each charge of 800 X using a bar scale because it meters like crap thru anything else.
 
For my first 10mm loads, I used Xtreme 180 plated HP bullets, and I got decent accuracy out of them but I wasn't shooting past 15 yards, either. I tried 4 different powders, Power Pistol, AA#9, Blue Dot, and BE86. I got the best velocity and accuracy out of BE86.

One of the things on my list to try are some jacketed bullets, both Hornady and Zero.
 
Back when I was loading the 10 (early 90’s), Unique was good. But I preferred a heavier load.

I believe you’re problems are two fold.
1. Light strikes. Primers aren’t seated fully. Also, you didn’t mention primer make. Some are more sensitive than others. Federal are quite sensitive. Some Fiocchi primers I had were exceptional hard... But, a Glock will almost certainly pop any well seated primer.

2. Accuracy. Ditch the plated bullets. My early G-20 had a “loose” bore. It shot .402-.403” cast bullets well, as it also shot jacketed bullets. However, a .400-.401” cast or plated bullet shot loose “patterns”.
I suggest the Hornady HAP bullets or Zero jacketed bullets.

Hopefully LongDayJake of RMR will start making some .40cal match winners...
 
I've loaded Berry's and Xtreme plated 180 gr bullets, and push them right up to the max velocity of 1225-1250 fps recommended by the manufacturer. Accuracy was good using both Longshot and AA#9, with the higher velocities coming from AA#9. I usually load them with 13.3 gr of powder. My load recipies show I could go up to 13.5 max, but I'm not going to bother until I buy some jacketed bullets.

Haven't tried Blue Dot yet. I'm happy with #9 and find it meters well in my Dillon. In fact it's like a dream come true after using Unique. Don't get me wrong, I like Unique for my 45s, but it meters like hell.

PS, $35-$40 a pound for Longshot! That is ridiculous. I usually get it for about $24.
PPS, Magnum primers aren't needed.
PPPS, Yeah, clean the striker and striker channel.
 
Last edited:
My primers are always CCI mag.
Sounds like I need to put the plated bullets on the back burner get some Fmjs push them a lil faster.
Going to place an order with Jake get some. 400 and 9mm.
Thanx for the direction to move in.
 
Yeah. Like I said, I use unique for light steel shooting loads. Accuracy doesn't matter so much on a 6-8 inch or larger target. It doesn't meter great but not so bad i worry about it. I use 6 gr and it won't throw far enough off to bother anything. I get many more rounds per lb and it feels softer shooting than anything else ive used. Feels about the same or even lighter than firing .40 out of the G20 ot G29. (Another thing I don't recommend anyone else do.......)
 
If you really want delightfully light-shooting loads in a 10mm case, try 220 grain bullets over a charge of VV N320. It's not a cheap powder, but at the charges I'm talking (~4.5 grains), you're not using much of it and it meters very well and is known for very low SD's. You can make major PF with this (knocks over steel very firmly if it's falling steel, whangs the dickens out of fixed steel) with modest recoil and very little in the way of blast/flash/pop. I've actually shot about a bajllion of these rounds in USPSA. The deep seating of the bullet helps generate a nice healthy initial pressure for consistent and complete ignition (low SD, low ES, clean burning). It's a really fun load.
 
The only powders I consistently struggle to find locally is Vihtavuori. One local store has probably 75 different powders and thet are hit and miss on the vv. Another local store carried it but went out of business. With the cheap .40 trade in ammo I'll probably just be shooting that for the next few years. I'm noticing its drying up now though
 
Eh, I either buy my powder online or buy it from/with other folks doing a group buy online. Every once in a while I'll pick up a single pound in person to try something new, but I would be pretty annoyed if I were limited to whatever I can find locally. The internet replacing brick-and-mortar commerce is definitely a mixed blessing, but may as well use the good half of the bargain!

But AA#2 might also serve a similar purpose. I haven't worked anything up with it, but it's sometimes called "the poor man's N320," so it often works as a pretty good substitute (different charge weights, just similar benefits and performance - totally different powder though).
 
AA#2 is way too fast for 10mm. Try AA #9 or Blue Dot for 10mm. 800x is a good 10mm powder but some don’t like how it meters.
 
It is way too fast (as is N320) if you're trying to make full power 10mm loads. Totally agreed.

creston' and I were discussing making softer-shooting loads, and I was specifically talking about soft-shooting, heavy-bullet loads. I can promise you N320 works for that. I've shot 10k+ of them. And AA#2 has similar applications and burn rates (although it is a totally, totally different powder).

I'm with you on AA#9 being good stuff for the full-power loads.
 
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