seeking 10mm 200 gr 1300 fps

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thomis

thomis

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Not new to hand loading, just new to 10mm, I didn't have to buy new dies since I've been loading for .40 S&W. That being said, I have acquired a new SIG X-TEN 10mm that I absolutely adore...I'd like to achieve 1300 fps with the 200 gr hard cast projectiles I acquired from Montana Bullet Works... If Buffalo Bore can push a 220 gr hard cast to 1,200 fps, I believe I can get 1,300 out of 200 gr. So far, I've begun with the starting charge using every powder I mention below. I've worked up, shooting volleys of 3 at incremental charge increases over the chronograph. I'm at max charges in both my new and updated Hornady and Lyman manuals as well as the powder websites I'm using. I'm seeing ZERO signs of over pressure. No flattened primers, no bulged cases, nothing. What I'm asking is IF you have safely achieved what I am trying to do out of a 5" bbl, please share your data. The only powder I have not tried so far is AA#9. As soon as I can get some, I will try some loads with it. Another thing to note, I'm having to use a shorter COL so these reliably feed through the magazine. This should increase pressure but I have not seen any signs..I've included a photo of some recovered lead, these projectiles from Montana Bullet Works have a BHN 22 rating, that is super hard. Very impressive. Very little leading in the bbl... IMG_2872.jpg IMG_2873.jpg
IMG_2877.jpg unnamed2.jpg unnamed3.jpg IMG_2874.jpg unnamed6.jpg
 
I have gotten to 1250 fps from a 6.5 inch revolve pushing a 200 gr XTP. Unfortunately it was with IMR-800x that Hodgdon recently discontinued. 800x was a wonderful 10mm and 44 Mag powder, I am going to miss it when I run out. I am pretty sure I could have safely got to 1300 fps with that powder but 1250 shot so nice for me (2-inch 5-shot group at 50 yards with irons) I stopped there.
 
26 year old me "sure you can probably get there, flattened primers are normal with hot loads so wait till you start seeing them"
I had a 135gr nosler load that ran over 1600 from my Delta Elite comp gun. And ran 175 LSWCs at over 1300.
56 year old me "why dip that far in your margin of safety, for 50 or 100fps that no target or game will notice"
Now my 135s are a bit over 1500 and the 175s are a bit under 1250.
 
I travel for my job so out of town now but I will resume working on the loads this weekend. The only way forward, at least the way I see it, is to go above the max published data a tenth of a grain at a time looking for pressure signs and watching the chronograph. And I'll be looking for some AA#9 as I travel..
 
thomis said:
I travel for my job so out of town now but I will resume working on the loads this weekend. The only way forward, at least the way I see it, is to go above the max published data a tenth of a grain at a time looking for pressure signs and watching the chronograph. And I'll be looking for some AA#9 as I travel..
Click to expand...

If you go thru Southern Ohio holler at me. I may be willing to give up a lb of 800X if your interested.
 
I’d like to drive a 200 gr Nosler JHP to 1250 out of my G20 and S&W2.0 and AA9 is getting too compressed to get to 14 gr (Speer 13th Edition) so I’m gonna try Longshot next.
 
Given the case capacity and pressure limit of the 10mm, to push a 200gr that fast from a 5" barrel, I believe you need to consider using a true modern magnum powder. Such as H110.

I've never done it. I don't know where to start. But just considering what is and is not possible with .357, .41 and .44 Magnum cartridges, I think that's the direction you'd need to go.
 
Hodgdon's Longshot is probably second best to IMR's 800x for the 10mm, but only by a wee margin.

And, if I recall right - unlike 800x, it's far more meter - friendly.
 
I'm surprised lil gun is not in the running. Seems like Buffalo bore is stated to run 357 and 10mm fast with that powder.
 
Lil'gun is too slow, you probably can't get enough in the case to get the velocity.

Interestingly if you look at Hodgdon online database there are four different 200gr bullets in 10mm Auto and the fastest loads are still shy of 1200 fps and that is from a 5-inch barrel.
 
mcb said:
Lil'gun is too slow, you probably can't get enough in the case to get the velocity.

Interestingly if you look at Hodgdon online database there are four different 200gr bullets in 10mm Auto and the fastest loads are still shy of 1200 fps and that is from a 5-inch barrel.
Click to expand...
N105 claims it can be done at 10 grains. That's 1200 not 1300.
 
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I've not tried H110 in 10mm, but I came across this from the 10mm firearms forum: "You can't get enough H110 in a 10mm case to generate enough pressure to cycle the action".
WrongHanded said:
Given the case capacity and pressure limit of the 10mm, to push a 200gr that fast from a 5" barrel, I believe you need to consider using a true modern magnum powder. Such as H110.
Click to expand...
 
sparkyv said:
I've not tried H110 in 10mm, but I came across this from the 10mm firearms forum: "You can't get enough H110 in a 10mm case to generate enough pressure to cycle the action".
Click to expand...

That's very interesting. Working back down the powder ladder, perhaps 2400 is worth a look.
 
2400 is a great powder, but it's geometry is such that you can't get enough of it into the case; 2400 won't get there. This I can confirm.
WrongHanded said:
That's very interesting. Working back down the powder ladder, perhaps 2400 is worth a look.
Click to expand...


Blue Dot is my favorite (most accurate) 10mm powder, but it won't deliver these targeted velocities either.
 
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I just looked. Buffalo Bore isn't getting 1250fps from their 200gr FMJ. And their 220gr hardcast isn't really a 1200fps load, based on how only one of the three test guns is achieving that.

Every cartridge has its limit. Or so I've been told.
 
thomis said:
When I learned about 800x going away I decided not to experiment with it.
Click to expand...

If you pass through my area give me a shout. I will give you a lb. or more of 800x. It is a great powder. I use it for 357sig and 10mm. It works great in these two.
 
H110, W296, 2400 are all great 41 Mag powders but if you look at that data it quickly becomes evident it will not work for 10mm simply due to the lack of case volume. A 210gr 41 Mag bullet needs 22gr of H110 to get ~1600 fps froma 10.125 inch barrel. There is no way your getting any where close to that much powder in a 10mm case let alone seat a bullet on it.
 
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I just remembered that I recently acquired some Alliant BE-86, but not yet tried it. I've read that it can push 10mm loads pretty fast...perhaps something the OP may consider.
 
I use the same bullet and after testing a variety of powders, found that Blue Dot was the most accurate in my G20. I did not do any chrono testing of this load. I'd look at AA#9 as a likely candidate.
 
The Glockodile said:
Hodgdon's Longshot is probably second best to IMR's 800x for the 10mm, but only by a wee margin.

And, if I recall right - unlike 800x, it's far more meter - friendly.
Click to expand...
Longshot meters "acceptably," I'd say. Not as perfectly as the AA# powders, but not terribly.

It's a great 10 mm powder. I made some very zippy 180 grain rounds with it. I sold my 10s because they were aggravating my flinch, though. I couldn't resist pushing them hard, because, otherwise, why not just have a .40 S&W?
 
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