9x25 Dillon (or... 357sig? pffft. hold my beer....)

MikeS. said:
I had NO Idea that my favorite caliber, 10mm, had been infested with SPPs. Makes me Ill!
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The only COMMON ones you see are the BLAZER BRASS loads. The others are extremely rare, and dont seem to have been made in many many years.

That said before primers dried up, I intended to collect the Blazer Brass shells and one day use them with small pistol or small rifle primers.

Maybe use them as a form of load identification and the like
 
I'm typing in all the load data I can find on the internet into one large spreadsheet. So far I've got ~120 load chrono results and am about 1/3 the way through the first jumbo thread on glocktalk.

Also, I've done a few more tests and am getting up to the 'max load' for the 90gr longshot combo. Others have reported to have gone past this load, but I'm thinking if this doesn't get me the 2k fps it's not going to happen out of my barrel length. The pressure signs are all there, do not pass go, do not collect the parts of your gun as the explode across the range.
 
Chrono results today for the 12.2gr longshot / CCI350 / 90gr XTP. Average was.... 1965. Looks like my 2000 fps goal will not be possible without a 6" barrel.

Still, it's a respectable amount of energy.

EDIT: I can't add more powder, or make the barrel longer, but I can make the bullet lighter. We have to go a little exotic, but I found these in stock so we'll give it a try. I know those ARX bullets are lighter, but I can't find them anywhere.

1616806314769.png

Yea, 65gr copper screwdriver tips. Use the same powder charge, but lower the projectile weight 20% and... we shall see if they ship.
 
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Jayne said:
Chrono results today for the 12.2gr longshot / CCI350 / 90gr XTP. Average was.... 1965. Looks like my 2000 fps goal will not be possible without a 6" barrel.

Still, it's a respectable amount of energy.

EDIT: I can't add more powder, or make the barrel longer, but I can make the bullet lighter. We have to go a little exotic, but I found these in stock so we'll give it a try. I know those ARX bullets are lighter, but I can't find them anywhere.

View attachment 319017

Yea, 65gr copper screwdriver tips. Use the same powder charge, but lower the projectile weight 20% and... we shall see if they ship.
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I cant wait to see this. I always wanted to try those in .357 sig, so why not 9x25mm?!?!
 
Desolo said:
I cant wait to see this. I always wanted to try those in .357 sig, so why not 9x25mm?!?!
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They're a royal pain to get loaded correctly... wouldn't want to make too many of these.

Chrono testing this weekend if I'm lucky.

12.2gr Longshot, CCI350, 65gr Lehigh all copper screwdriver tips

IMG_9682.JPG
 
Jayne said:
If I get my speed out of them I'll reset the seating depth a bit, they can be slightly longer and still fit the mag OK with the flat nose.
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I wonder how they will feed if left that long?
 
This has been a fun project to watch. I can't help but wonder what you could get a 147gr XTP up to. That bullet at 1500fps could get some serious work done.
 
If I recall correctly, 147gr 9mm bullets have sectional densities on par with 230gr .45 bullets.... same as 180gr 10mm....
 
frakncylons said:
So is the goal 2250fps now?
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Turns out... sure, let's make 2250fps the new goal so we can claim we've reached it.

First round over the chronograph today:

IMG_9683.JPG

5 shot average was.... 2271! String was: 2292 2263 2268 2267 2263

Primers clearly saw some pressure but nothing like the 90gr with this same charge:

IMG_9684.JPG

On that first shot I actually aimed at a piece of steel through the chronograph screens, and then remembered not to do that for the rest. It really sets the steel to swinging, and after I went and checked that 1 hit:

IMG_9685.JPG

That's at 15 yards on a 6" free swinging target. Ouch. Didn't quite show up as well on camera, but in real life you can see the copper on the plate in addition to the #3 Philips dent.

I'll load up a box of 25 of these nonsensical rounds just to say I've got them, and call it mission accomplished.

Now, if I can score some blue dot I'll work on the fireball rounds.
 
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Jayne said:
Turns out... sure, let's make 2250fps the new goal so we can claim we've reached it.

First round over the chronograph today:

View attachment 321167

5 shot average was.... 2271! String was: 2292 2263 2268 2267 2263

Primers clearly saw some pressure but nothing like the 90gr with this same charge:

View attachment 321166

On that first shot I actually aimed at a piece of steel through the chronograph screens, and then remembered not to do that for the rest. It really sets the steel to swinging, and after I went and checked that 1 hit:

View attachment 321165

That's at 15 yards on a 6" free swinging target. Ouch. Didn't quite show up as well on camera, but in real life you can see the copper on the plate in addition to the #3 Philips dent.

I'll load up a box of 25 of these nonsensical rounds just to say I've got them, and call it mission accomplished.

Now, if I can score some blue dot I'll work on the fireball rounds.
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I want a fireball recipe for 44mag, is Blue Dot the way to go?
 
Just dorking around making up more of the 65gr loads to put in a box for the 'future'.

With Sig brass these lehigh need either more flair to the brass (which splits this nickel stuff like crazy) or just a touch of lube to seat the bullets without bulging the case. With RP brass they seat without drama.

9x25_art_1.jpg

9x25_art_2.jpg
 
Bravo sir! Bravo for sticking with the project. I didn’t think it possible.


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Any updates or experiences? I am wondering if you thought of using 10mm magnum cases rather than 10mm auto. They appear to have thicker webbing for handling higher pressures, and presumably would just need to be trimmed down. Besides gel testing mentioned above, I'd also love to see if anyone knows of a "ballistics" by the inch cut down from 9" down to see what the average fps difference is per inch. Cool project! Cool PDW caliber similar to the new FK 7.5. I think another cool wildcat that needs to be made that would sit right between the two would be to neck down a 10mm to .32 cal keeping over all length to something that would just fit the g20 or a 1911.
1692374817026.png
 
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No more updates from @Jayne since I bought his 9x25 equipment (dies, brass, G20 with conversion barrel) earlier this week. 😁

Unfortunately, I have way too many hobbies, so no telling when I'll get around to reloading it, but I am hoping to shoot some rounds Monday.
 
I can only presume at some point in this process that max loads using the 65gr phillips head were developed in .357 Sig at some point in time? I'm curious to know the specs of that load if anyone wants to share (powder, primer, brass preferences etc. I'm gearing back up to rekindle a long-lost-love.... I would hate to re-tread ground already trod so to speak.
 
commiecuriocollector said:
I can only presume at some point in this process that max loads using the 65gr phillips head were developed in .357 Sig at some point in time? I'm curious to know the specs of that load if anyone wants to share (powder, primer, brass preferences etc. I'm gearing back up to rekindle a long-lost-love.... I would hate to re-tread ground already trod so to speak.
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underwood loads it. From what I can tell they likely use longshot. I mostly load my 357 Sig with accurate #9. However the 65 gr can probably get away with a faster burn like accurate #7. The tricky part for my 357 Sig loads has been proper neck tension. it seems like less crimp is more. Likely the same in 9x25 Dillon, which I’d be inclined to tinker with if barrels and brass were more available.
 
92G said:
underwood loads it. From what I can tell they likely use longshot. I mostly load my 357 Sig with accurate #9. However the 65 gr can probably get away with a faster burn like accurate #7. The tricky part for my 357 Sig loads has been proper neck tension. it seems like less crimp is more. Likely the same in 9x25 Dillon, which I’d be inclined to tinker with if barrels and brass were more available.
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It's been over ten years since I last did any reloading, but unfortunately things seem to be as vague and ambiguous now as it was then regarding satisfactory projectiles for .357 sig.

I have stocked up on No 7 and No 9 and found the random can of longshot here and there, so glad to see the recommendations on powder are what I had been guessing. But.....

Any specific projectiles that ya'll are loading successfully in .357 Sig? I am slowly buying up stock to start loading but basically am limited to eyeballing construction/ogive and hoping they will work properly. And counting on loading 9mm etc when they don't.

I'm not particular to weight or even construction, just so long as they are loadable without pulling my hair out as was the case in earlier years. Primarily I want to load Full Power + loads without breaking the bank. Some screwdriver tips and other exotics are certainly going to be on the menu as well, but I mainly want to load quantity for some decent practice.
 
@commiecuriocollector

for 357 Sig I’ve had good experience loading XTP bullets. i know they aren’t the cheapest but considering they’re truncated cone, high quality jacket and really consistent it’s worth it. Xtreme Bullets might have a good option too. but for this higher velocity cartridge Im willing to spend a bit more on projectiles. for weight my preference is 124 or 147 which are convenient to have for 9mm loads too. The 147 is a breeze to load for 357 Sig as the boat tail helps them during seating. Accurate #9 is wonderful in my experience as it provides an almost compressed load and thus supports the bullet. Im really not convinced it’s possible to dangerously over charge with AA #9. Plus the performance from longer barrels like a G31 are absolutely amazing.

my 124 gr 357 loads are a hair under 1500 ft/s. I’ll take it.

FWIW, I don’t think my experience with 357 Sig is at all unique. I’ve read many forum posts basically describing the same with 357 Sig, which is what turned me onto AA#9. That and ive become a fan of Western powders especially true blue and Enforcer for 357/44 magnum.
 
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commiecuriocollector said:
I can only presume at some point in this process that max loads using the 65gr phillips head were developed in .357 Sig at some point in time? I'm curious to know the specs of that load if anyone wants to share (powder, primer, brass preferences etc. I'm gearing back up to rekindle a long-lost-love.... I would hate to re-tread ground already trod so to speak.
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I never built any of the 65gr loads, went right to 9x25 for that.

My last 357sig load was a 90gr XTP over 9.5gr of CFE Pistol, CCI 400. Running 1731 fps average out of a 4.5" barrel (G23 sized but threaded so 0.5" longer than standard).

I did a 9.0gr CFE Pistol load with the same 90gr XTP and it was 1655 fps out of a converted G23, so a 4" barrel. Should have done that vs the 9.5gr in both barrel lengths but by this point I was moving to 9x25 so I didn't really test all that many 357sig combos.
 
Nice to see some up to date info on 9x25. Spectre Supply has surplus 9x25 5" 1911 barrels. Pretty low price. I have a bunch of odd ball caliber barrels from them and everything was good quality.

Wondering if the OP ever published his spreadsheet on loads? I respect the effort it must of taken. I'll re-read the thread, lots of good info to look at again anyway.
 
john4st said:
Nice to see some up to date info on 9x25. Spectre Supply has surplus 9x25 5" 1911 barrels. Pretty low price. I have a bunch of odd ball caliber barrels from them and everything was good quality.

Wondering if the OP ever published his spreadsheet on loads? I respect the effort it must of taken. I'll re-read the thread, lots of good info to look at again anyway.
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Well thankfully I saw none of the barrels you mentioned, as I have no desire to get into another caliber and a cheap 1911 barrel would make the PIA of figuring out how to pull it off without buying more stuff easier to overlook.

Very unfortunately that problem was nearly solved with this....

www.spectresupply.com

Conversion to 9x25 Dillon Stainless Barrel for Glock 20 LONG G20L Stock Length 6"

Factory New Conversion to 9x25 Dillon Stainless Barrel for Glock 20 LONG G20L Stock Length 6" for sale from Spectre Supply.
www.spectresupply.com


and on another note one of the 1911 9mm barrels hade this mentioned about it:

"
Brand New, High Quality 1911 Barrel

  • 9mm
  • Government Size (5")
  • Left Hand 1:32 for long distance accuracy"
Eh? for reals? How does that even work?
 
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