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G21 - .460 rowland

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klallen View Drop Down
.416 Rigby
.416 Rigby
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** The RockChucker **

Joined: 10 June 2003
Location: United States
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Post Options Post Options   Thanks (0) Thanks(0)   Quote klallen Quote  Post ReplyReply Direct Link To This Post Topic: G21 - .460 rowland
    Posted: 18 September 2012 at 15:00

evening, all.

i've had quite a little adventure getting this thing put together.  full story's over on the sister site.  anyway, i started that initial thread on may 16th.  at that time (when i originally ordered the g21 kit), a 3 week delivery time was advertised on their website.

last friday, sept. 14th, the "correct" kit finally arrived.  not bad     ...     4 months.  didn't get the free box of ammo for my trouble as they promised, but for now, i'm just happy to see the kit.

here's what we have :



stainless steel, threaded barrel.  dual-port compensator.  stainless steel, one-piece guide rod w/ 24# spring.

all dropped in easily :



compensator's a strange little number.  it's basically floating with the guide rod holding it in place as the slide functions under recoil.  i'd never personally seen this before but i've only got one other compensated semi-auto.  after a quick question and answer with my brother, i guess the system's common.

the business end :



i haven't put a single bullet down the barrel, yet.  i was hoping to use the "free" ammo they were going to send me to familiarize myself with the gun.  as it is, all i have worked up are my initial development strings and i'm not going to waste them just to be shooting the gun.  so, my first barrel test and handload range report will be one in the same.

she's kind of an interesting cartridge :



(l/r) .45gap / .45acp / .45super / .460rowland / .45winmag

ballistics claim a 250 - 260 gr bullet clipping along around 1150 - 1200 fps.  i'm not really sure i'll push things that hard in this light g21 platform.  excited to get the development rolling.

needless to say, i've still got the incorrect g30 kit they sent me weeks ago.  i'm not even going to think about sending it back until i've fully tested this g21 barrel.  i think i'm going to make them wait a while after that, also, before i think about returning their error kit.  don't want to be spiteful about this whole thing but maybe make them sweat it out a bit.  have them get ahold of me to see where their kit's at.  'spose, at some point we'll have to have a conversation about my "free" box of ammo and the postage paid return package they promised.  i did get a second t-shirt out of the deal     ...     but that don't make up for no ammo.  lol.

anyway, just happy to have this thing together.

with all the hoopla getting to this point, i wouldn't be suprised in the least to have the first field test not go smoothly.  but that's just negative thinking.  we'll stay positive.

 

k

A Big Mouth Don't Make A Big Man !!!



The Duke
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klallen View Drop Down
.416 Rigby
.416 Rigby
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** The RockChucker **

Joined: 10 June 2003
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Post Options Post Options   Thanks (0) Thanks(0)   Quote klallen Quote  Post ReplyReply Direct Link To This Post Posted: 23 September 2012 at 17:20
i headed up to the range to work on a couple other project so i thought i'd take this on up as well and do a little informal testing. i mostly just wanted to confirm the gun went bang and a bullet hit the target before i sent back the g30 kit that was sent in error.

we're not completely comfortable with the compensator system this rowland kit uses. it's completely floating, at this point. the forend of the guide rod doesn't extend far enough when the slide's locked home to engage the under-groove of the compensator. as such, that thing can twist and turn freely. not a good thing if you're not always going to be totally aware of the compensator position before pulling the trigger. loctite is their answer for holding the compensator in place but gluing things down on a high pressure handgun isn't what i'd consider ideal. when my brother gets a little free time in his schedule, he'll fashion a screw with an extended head to remedy this problem. until then, i needed to shoot this thing.

i didn't really want to waste my handload strings on an informal functionality test, so i threw together 10 more rounds at my starting load (9.4 grs power pistol) to work with.

got down on bag, took one last peek to make sure the compensator was aligned properly and touched off a round.

it fired fine, was very comfortable to shoot and there was a hole in the target. but it had hung up chambering the next round from the mag. i'd wanted to test feeding from the mag so i had loaded all 10 rounds. i took out the 9 remaining rounds and loaded up 3. each fired and the next chambered flawlessly, printing a respectable group at the 12 ft i was shooting.

so i loaded up the last 6 and got the chrony lined back up. accuracy was fine and the average velocity was 1077.8 fps, with my target being somewhere in that 1200 fps range.

however, shots 1 and 3 hung up feeding. not good. i'd chosen to use the 250 gr .452 xtp specifically to avoid this situation with it's hard alloy jacket and small diameter hollowpoint, compared to other options.

after chatting with my brother, i'm not all that concerned, as he'd just gone through the same problem solving project with a similarly compensated 10mm auto.

in short, i've got a little list of troubleshooting issues i'm going to wade through over the next little while. nothing related to a flaw or error in the handgun itself. just issues often associated with high pressure semi-auto rounds in compensated firearms.

first, i'll run through my handload increments. simply adding pressure and increasing the slide speed, marginally increasing the time it's in it's full open position, and allowing the next bullet just a little more time to properly align after initial recoil might be all that's needed to improve the feed. if not, we delve into springs. i heavier magazine spring could prove beneficial; forcing those bullets to be where they need to be in spite of the recoil. next, testing various recoil spring tensions. a combination of both. if none of this works, i may have to address things by the components used in the handload. dropping to a lighter bullet in efforts to lessen the jump of the gun and the affects it may be having on the bullet and it's ability to position properly in the magazine.

brother spent a lot of time on his 10 getting the combination right to get the functionality he wanted. i may be in for that same kind of process. hope not.

we'll see ................
A Big Mouth Don't Make A Big Man !!!



The Duke
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