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Never had a Glock but that looks like a pretty good setup. Doesn't Rowland make some kind of counterweight for the slide?
This thread really has me thinking about doing one of these. I just happen to have an "extra" 1911 that would be great for the cause.
Here is my setup:
Fun times. This is on a frame from a Gen4 Glock 41 that I own. I had purchased the completed long slide before the 41 (I was using it on a Glock 10mm frame so I needed the completed slide as well as the conversion kit, which consisted of the 6.61 inch 460R barrel, steel guide rod, 24lb spring, and compensator) otherwise I could have theoretically converted the G41 slide. The G41 slide is smaller (narrower, not as tall) as the Lonewolf or the G21 slide. Because of that, I prefer the beefier Lonewolf slide for 460 Rowland (Weight is your friend). I bought the extended long slide, without the top cuts to get the most mass on the top end, and have a longer barrel to build velocity of the round. One of the issues with 460 conversions is they can run too fast for the magazine spring, and cause reliability issues. Below is the setup. It was just under $500 for the complete top end, all in with shipping and the adjustable sights.
The loads I am using are 12.1 grains of Hodgden Longshot, with Hornady 230gr XTP JHP, CCI 300 large pistol primers, Starline Brass, and a COL of 1.270. I worked this load up in several increments starting from 9.5gr of powder and moving up to 12.1 ish. I am using a Lee AutoDisk powder measure and the 0.92 disk hole, which meters between 11.9 and 12.3 and averages about 12.0-12.1. As you hit 11-12 grains of powder, you start seeing a sight flatening of the primer, but less than what you see with Underwood factory ammo. The cases show no signs of stress or expansion, which you would expect with that double wall thickness needed for CUP of 40,000 psi.
If you haven't figured it out yet, 460R is a hot wildcat load. With the 6.61" barrel, these loads should be pushing the 230gr XTP at 1,400 FPS! That is about a 1000 lbft of muzzle energy. Booyaa! Well into 44 magnum territory
So how does is shoot? Much tamer than you might think. Huge boom of course, but not much muzzle flash with the compensator. So far no failures from any load size, and very good accuracy. Recoil is stout, but no worse than the hot 10mm loads that I shoot out of this gun.
Both top ends will work on the G41, G21, and G20 frames. As I said before, the recoil is very similar between the 460R and the hot 10mm. I am guessing the comp and larger mass of the slide tame the 460R a little. The 10mm is 200gr at about 1300 FPS, so quite a bit more muzzle energy in the 460 Rowland, and a larger diameter to transfer it. Johnny sums it up pretty well in this video. I especially enjoy the part about 1:15 in.
[video=youtube;KzHD5jSNDDg]
ok so according to Rowland you can also shoot a 45acp and 45super in the Rowland converted pistol without changing anything. What I want to know is how that works since the 460R uses a much stronger recoil spring than a 45acp?
I would think, from a purely technical standpoint, that if the gun failed to reliably cycle with ACP then that just meant the gun was heavily insulted by the 'little girl' round, and puked from disdain!
1:15 into that video has made me a believer, and I'm having ALL of my guns rechambered for the round!
380, 9mm, 10mm, 38spl, .308....