Home Forums Hunting & Shooting Handguns GP-100 in 10mm

For those of you who were asking............straight from the factory.

http://gunblast.com/Ruger-GP100MC-10mm.htm

Nice looking revolver - this 4" half lug configuration is something they should have offered decades ago. Glad they didn't cut flats on the barrel, that really detracts from the looks IMO.

I saw that. Looked pretty neat.

Last October I was at a product development session that Ruger put on and asked about a GP-100 in 10mm... The VP I spoke to said it was in the testing stage but would not be ready for the SHOT Show. He said it should be out in the March/April area if the tests worked out well...so I guess they did...

Guess this will kill Clements Custom conversions...not like he doesn't have other things to keep him busy...

Bob

This will get me to buy a 10mm revolver. Probably should get another Dillon Square Deal B to go with it too

I have three .41 mags - I don't see any benefit for me. The 10mm is not quite up to the .41 and the only benefit it has is it works in semi-autos.

Added =- if you already have 10mm semis, then I can see why you'd want this revolver. It is just not for me.

Very cool and very practical.

Happy to see Ruger take advantage of their most underrated frame.

Interesting.

Is it just me or is the 10mm running slow?. The mag speeds are like 10 mm speeds.

10mm speeds rarely match what folks expect them to.

Some folks got nutty ideas about what 10mm ought to do.

...yea, 1250 fps with a 200 hard cast and 1600 with a 140 is pretty mundane....

I will wait for the full lug that I prefer, just looks better to me and almost every GP they offer has the full lug. I think the SRH looks better than the GP Match. I also would prefer a 4.2" GP after having owned a 6".

Couple interesting things in Jeff Quinn's blog report...

He had the chamber deepened to take 10mm Magnum. He then also stated that after a few hundred rounds ignition became "iffy" because the full moon clips had gotten beaten up. Since I and many of my friends have been shooting .45 ACP since the 1970s, I have never observed ignition problems with clips that have been in use for years... My belief is that when the chamber was deepened to take 10mm Magnum the dual headspacing ability for the 10mm was removed causing more flex in the clips which with the high pressure of the 10mm that lead to their early demise. If the chambers are properly cut for 10mm, rounds should be able to be reliably fired without the clips just like .45s can be shot from a 25-2. The cases will not eject but can just be picked out by ones fingers.

If one is shooting a lot of .40 S&W this may become a problem in that the clips will take more abuse.


Second: SIG 10mm 180s...listed velocity on the box that has been confirmed by many shooters is 1250 fps. From the 4" revolver it looses 100fps...


Third: 10mm Magnum...the 135 Doubletap ammo lists the velocity of 1900 fps...but chronographs 1263...wonder what kind of firearm the manufacturer tested it in...a 14" TC Contender barrel?

One thing I don't see listed is if Jeff checked the rounds for bullet pull after firing five shots... Knowing how this gun is going to recoil I have a feeling there is going to be some since semi-auto pistol ammo can't be roll crimped to prevent it unless one is loading rounds only for the revolver...

The above said...I think I am going to get one to go with my semis...

Bob

I'd not get hung up on the numbers, I'm sure it's a typo or chrono issue

I know there are legit reasons why some would want a 10mm in a revolver, but like the efficiency of my 10mm semi-autos in terms of size, weight, and velocity produced based on my chrono results versus those of the GP100 in the linked article by Jeff Quinn.

For example, my:

1. G29 is: 10 ozs lighter; 2.6” shorter; 1.5” less tall; and holds 5 more rounds than the GP100;

2. G40 is: 9 ozs lighter than; the same length as; 0.5” less tall than; and holds 10 more rounds than the GP100; and

3. DW Bruin is: 7 ozs heavier than; the same length as; and the same height as; and holds 3 more rounds than the GP100.

None of those three autos ever have had a FTF. The article mentioned increasing FTFs with the GP100 as the moon clips wore out.

The G29, in a much smaller package, performs about the same as the GP100; and the G40 and DW Bruin, in about the same size, perform a fair bit better. They all hold more rounds and probably recoil less than the GP100.

Below is a composite comparison of my chrono results and Mr. Quinn’s for 10mm loadings that we both have chronoed:

DOUBLE TAP 200GR HC:
1,226 fps: G40
1,220 fps: DW Bruin
1,086 fps: GP100
1,081 fps: G29

BUFFALO BORE 220GR HC:
1,216 fps: DW Bruin
1,080 fps: GP100

SIG-SAUER 180GR JHP:
1,258 fps: DW Bruin
1,152 fps: GP100

Not saying the GP100 is not a nice package. I just like the efficiency of my autos in that type of caliber.

Can't fault your reasoning at all... The semis are smaller, lighter and hold more rounds...

I really think that Jeff created his own problems by having the chambers deepened to take 10mm Magnum...we shall see as I just ordered one...

Interesting. Do you means as to the moon clips wearing out?

Yes...I have never heard of a .45 ACP moon clip wearing out. That is probably because the case mouth is supported on the chamber ledge as well as the moon clip.

By deepening the chamber on the 10mm, the case lost its forward support and so there will be a lot more flexing of the clip. The 10mm also operates at a much higher pressure than the .45 which will accelerate the wear even more...

Are you comparing loaded weights? People compare empty weights all the time and it makes no sense. Add 15rds of ammo and things change dramatically. Glock lists the loaded weight of the G20 at 40oz. I don't yet have the 10mm but my 3" .44Spl is 34oz. Ruger lists the 10mm at 37oz and I think that's probably accurate.

Glocks have terrible, coarse sights and a similarly described trigger.

No Glock will match the accuracy of a good revolver.

Not everyone who wants a 10mm wants a friggin' Glock.

Makes sense.