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460 rowland

This is a discussion on 460 rowland within the MP Talk forums, part of the Smith & Wesson MP Forum category; Anyone convert their .45acp to the 460 Rowland? How does it run? Looking for info from someone who has done the conversion....

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Old August 26th, 2016, 05:18 AM   #1
Join Date: Jul 2006
Location: san antonio,texas
Posts: 33
460 rowland

Anyone convert their .45acp to the 460 Rowland? How does it run? Looking for info from someone who has done the conversion.
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Old February 7th, 2017, 07:51 AM   #2
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Location: Massachusetts
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I joined to reply to your post. The Rowland kit in my M&P 45 runs 100% with Johny's 460R 250gn hardcast as well as with 45ACP 230gn Rem Golden Sabers. The kit comes with a power mag spring, a stout recoil spring with a steel guide rod along with the barrel and comp.

The kit arrived two weeks after ordering, I was expecting 4 to 6 months. The only negative I have encountered is the recoil spring is so strong that the slide release is almost a two thumb operation, I slingshot anyways. It may soften up after more rounds. Recoil is not harsh but what you would expect from a 1300fps hunk of lead. Accuracy is on par with the stock barrel which in my case is pretty darn good.

Ejection pattern with the 460 hardcast is 4 o'clock at 8 feet and with the 45ACP is 3 o'clock at 1 foot. (3 feet straight up and right) I have 185gr and 230gr HP from Underwood on order. The 185 is 1500fps wow. This setup is my woods/bear gun and with the addition of a Apex duty trigger, glock style trigger shoe and Houge grip I'm really liking it.

Last edited by Ryder700; February 10th, 2017 at 09:02 PM.
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Old February 7th, 2017, 01:06 PM   #3
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Location: Central Maine
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That's good to read, thanks! I've been drooling over the round since I first heard of it years ago. I might need to get one and satisfy myself. The fact that it's in a 1911 only makes it better IMO.

The heavy spring rate is required and you probably don't want them to soften; for safety. The more oomph out the barrel the more resistance required behind the breech. The slide only weighs so much, the spring gives the rest of what's needed to keep things closed until the pressure is reduced to a safe level.
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Old March 3rd, 2017, 07:45 AM   #4
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Join Date: Feb 2017
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Some chronograph data from various 460R loads I shot yesterday through my M&P 45 with the 460 Rowland kit. Utilizing a ProChrono chronograph placed 10 feet from the muzzle. Temperature 33F. Five shot average. No malfunctions. All velocities are lower than advertised most likely from the low temperature. I will retest these loads on a warm day and report back.

45ACP 230gr JHP Remington Golden Saber = 777 fps avg.

460R 255gn hardcast FP Johny's Large and Dangerous game load = 1165 fps avg. (advertised 1300 fps)

460R 230gn JHP Underwood = 1303 fps avg. (advertised 1400 fps)

460R 185gr JHP Underwood = 1438 fps avg. (advertised 1575 fps)

Last edited by Ryder700; March 3rd, 2017 at 08:04 PM.
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