10mm Loads for Ruger Re olvers

[MagnumM]

Now that Ruger chambers two Revolvers in 10mm, had anyone developed any hot loads specific to GP or the SRH? I still think that the longer the barrel and the slower the powder burn rate for a more complete burn, Blue Dot would be the best bet. Thoughts or any loads?

[RJM52]

I'm picking up a GP-100 Wednesday...

As to "hot loads", not really sure how hot I'll run it. I have a stainless Taurus Tracker in .41 Magnum that is about the same size and weight as the GP-100. Warm loads get unpleasant real fast past a certain point.

Bob

[Rick R]

I personally wouldn't push the GP too hard until they've been out for a while.  BUT! Alliant shows 10mm data using 2400 on their website.   It's only 180gr at @1,200fps but it might be a start.

[blaster]

I imagine the Red Hawk would be able to take some pretty stout loads. with the bullet seated out farther, you can cram a lot more powder in the case. I wonder how it would compare to the ,41 mag.?

[RJM52]

I shot mine last Saturday with some 180 LNR with 6.0 grains of Unique.  Can only estimate the velocity is about 1000 fps.

Also shot two loads that were developed for semis... A 165 Speer GD at 1300 and a Montana LBT hardcast 200 at 1210 from a 4.25".

The 165s ejected with ease.  The 200s had nice round primers but ejection was stiffer. They would also take a bowing pin right off a 4" wide table...  My guess is that they are up close to 1200 fps...

Bob

[FreeMe]

I'm still slowly working my way up through published loads for 200gr cast with my Match Champion. Nothing new here, data-wise. But factory loads I've tried pass what I'm seeing published for handloads. 220gr Underwood @1170 fps (1200 from a 5" auto claimed) and Doubletap 230gr @1045 fps (1100 from 5" auto claimed). Nothing that looks or feels excessive so far, although the DT load was a little reluctant to eject fired cases from dirty chambers....Which is odd, because that load was quite comfortable in recoil. It had been fired a bit with mild loads prior though. (shrug)

What I'd like to know is if anyone has tried seating these heavier slugs for longer oal for more case capacity. There is room for that in the Match Champion. Seems like it should be possible to get a little more fps without getting excessive pressure - especially since some people have reported reaming out the chambers to 10mm mag. In my mind, this might be THE reason to have 10mm in a revolver - considering the possibility of having "entry-level" 41 mag approximation in a smaller package while retaining all six shots.

[Muskrat]

...But factory loads I've tried pass what I'm seeing published for handloads. 220gr Underwood @1170 fps (1200 from a 5" auto claimed) and Doubletap 230gr @1045 fps (1100 from 5" auto claimed)...

That's pretty typical. Couple of things... DT tends to exaggerate their velocity...A LOT. Underwood usually comes in above stated velocity, though in the case of their 220 grain 10mm load, pull downs have shown that the bullet doesn't actually weigh a full 220 grains, while my bullets from the same supplier weigh over 220 grains.

Also, you're never going to get pistol velocity out of a revolver because of the gas escape between the cylinder and the barrel. How much velocity you loose is dependent on the particular gun and even the particular chamber, but a revolver will never equal a pistol for velocity if all other factors are equal.

Loading long might work out well...might not, depending on how far you push it. One thing to keep in mind is that the longer and hotter you load, the more likely you'll encounter bullet-pull. Bullet-pull will freeze a revolver up solid, and it takes time and shop tools to make it spin again. No velocity gains will ever compensate for that fatal flaw.

[FreeMe]

...One thing to keep in mind is that the longer and hotter you load, the more likely you'll encounter bullet-pull. Bullet-pull will freeze a revolver up solid, and it takes time and shop tools to make it spin again. No velocity gains will ever compensate for that fatal flaw.

Good point.

When I measure oal of these factory loads, they all come under the usual oal listed in load manuals. In fact, the Doubletaps measure 1.246 and the Underwoods come in at 1.243. I assume that is to ensure feeding in autos, but still they clock higher velocities than the load books show as max. If I can gain back what I lose in cylinder gap by seating longer and using slower powders, I'll consider the exercise worthwhile. If I can better these loads safely by another 50 fps or so, I'll consider it a huge win.

[Muskrat]

"If I can better these loads safely by another 50 fps or so, I'll consider it a huge win."

Careful with that one! I had the same idea at one time, and I've personally come to the conclusion that it's not prudent to even try to duplicate them, much less exceed them. If I want Underwood velocity, I just buy Underwood ammo. If I want more velocity, I switch to a different cartridge. YMMV.

[FreeMe]

I admit - that's a pretty big "if".

I think the underwood  load is GTG as is, really. The one I'm truly interested in is the Doubletap, and it may never happen. The first hurdle is finding a source for that 230gr WFN projectile, and I'm having no luck there. Second hurdle is load data for same, and that's a blank. So for the time being, there's not even a place to start - which is a shame, because I think that that longer bullet deserves a longer oal for a safe max revolver only load. It's all speculation, until I find that bullet - and even then, a long ladder from the basement just to approach even the velocity the factory load shows. Right now, I think a phone call to Doubletap is in order. In my perfect world, they would be convinced to work up that "revolver only" 230gr load, and I go on my way to other projects.

[Muskrat]

Every 220 grain Rim Rock bullet I've ever bought weighed 226 grains. Pretty close to 230 grains...

[FreeMe]

That's good to know - thanks. But that DT bullet is the exact profile I'm looking for. WFN-LBT, with a very sharp edge. More like this - only heavier...

https://3l6fctfonm15nkjz4bz3j1eg-wpengine.netdna-ssl.com/wp-content/uploads/2016/09/DSC3324-Copy-Pistol-10mm_LBT_200GR._WFN-PB.jpg

[mr.revolverguy]

If I can't get it done with 8.8gr of power pistol under a 190gr SWC Cast and Coated I am throwing my revolver down and running for my rifle all while screaming like a little girl. This load is over max but has not caused me an issue.

[cwlongshot]

Hahahaha. You guys!!    

Its NO DIFFERENT then working up Loads is ANY GUN! Start low and go slow. LEARN PROPER reading of pressure signs.

These Boutique loads in a way are WAY LESS SAFE! They are loaded to SAMMI PRESSURE MAX's. SHOULD BE SAFE.... Might shoot the gun loose too!!

Your FAR FAR FAR better off learning proper loading and building max loads that you KNOW Unequivocally that are safe in your gun!

Ooh and YES 100% Id start with a bullet as long as would fit/work in your cylinders!!! Ya can adjust to test, but if your building max lods ya NEED POWDER SPACE!!

CW

[Ramjet]

I found the one I own loves lighter bullets at just under a max load as CW said work your up you will find the sweet spot and many times that's a ways off of !ax loads.