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The New Automag Part 3

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Littlefieldk View Drop Down
180 Auto Mag
180 Auto Mag


Joined: 15 Apr 2019
Location: Wa state
Status: Offline
Points: 28
Post Options Post Options   Thanks (0) Thanks(0)   Quote Littlefieldk Quote  Post ReplyReply Direct Link To This Post Posted: 28 Mar 2022 at 4:49am
Yesterdays session revealed more problems with the threaded accelerator pin.  I’ll explain more after discussing with auto mag ltd. 

Round count is 105. 
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Mark F View Drop Down
International Auto Mag
International Auto Mag
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Joined: 10 Apr 2008
Location: Northern VA
Status: Offline
Points: 235
Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark F Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2022 at 1:51pm
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pbcaster45 View Drop Down
180 Auto Mag
180 Auto Mag


Joined: 19 Feb 2019
Location: Oklahoma
Status: Offline
Points: 26
Post Options Post Options   Thanks (0) Thanks(0)   Quote pbcaster45 Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2022 at 8:35am

I got my Classic Edition this weekend.  It looks like it's going to need hotter loads than what I've seen posted elsewhere.  Posted this info on my.automag.com also.

Gun:  Auto Mag LTD .44 AMP
8.5-inch Barrel 

I learned today that the old loads posted by Kent Lomont and Lee Jurras in the 70s may not be as outlandish as I thought!  I'm going to have to step up the powder charges until I get consistent slide lock.  I probably should have waited until my gun arrived instead of making so much ammo.  Still, can't complain until the gun is broken in.

I haven't shot any groups yet, the target board at the range had been blasted into oblivion and it was way too hot for me! Just fired 5-rounds of each load to get some baseline data.  I was not limp-wristing the gun, but the recoil springs are stout!

Bullet: SBR 44 AMP 240 Grain Hornady XTP (Factory)
Case: Starline
OAL: 1.600 – 1.605
Average Velocity: 1503 fps
ES: 24
SD: 8
Comments: Multiple stovepipes.

Bullet: Sierra 180 gr. JHC
Powder: Winchester 296 27.0 grs.
Primer: Winchester Large Pistol
Case: Starline
OAL: 1.600 – 1.605
Average Velocity: 1668 fps
ES: 200
SD: 76
Comments: Multiple stovepipes, underpowered

Bullet: Hornady 200 gr. XTP-HP
Powder: Winchester 296 26.0 grs.
Primer: CCI-350
Case: Starline
OAL: 1.600
Average Velocity: 1723 fps
ES: 40
SD: 16
Comments: All five test rounds stove piped.




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Luvz2Shoot View Drop Down
Callahan's Auto Mag
Callahan's Auto Mag


Joined: 16 Apr 2011
Location: Washington
Status: Offline
Points: 579
Post Options Post Options   Thanks (0) Thanks(0)   Quote Luvz2Shoot Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2022 at 6:44pm
I am not the brightest...... what does "ES" and "SD" mean?


Thanks
If you were happy and you knew it, would you clap your hands?
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pbcaster45 View Drop Down
180 Auto Mag
180 Auto Mag


Joined: 19 Feb 2019
Location: Oklahoma
Status: Offline
Points: 26
Post Options Post Options   Thanks (0) Thanks(0)   Quote pbcaster45 Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2022 at 9:29pm
ES = Extreme Spread (velocity difference between highest and lowest shot)

SD = Standard Deviation (average variation of all shots fired)
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pbcaster45 View Drop Down
180 Auto Mag
180 Auto Mag


Joined: 19 Feb 2019
Location: Oklahoma
Status: Offline
Points: 26
Post Options Post Options   Thanks (0) Thanks(0)   Quote pbcaster45 Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2022 at 10:51pm
I only fired 20 rounds yesterday and I may not have applied enough Auto Mag gun oil the first time.  Took the gun down and lubed it again - could feel a difference.  Hopefully that will aid function.
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Rocketthon View Drop Down
International Auto Mag
International Auto Mag
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Joined: 13 Apr 2013
Location: Texas
Status: Offline
Points: 223
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rocketthon Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2022 at 12:37pm
i can speak for the 180 gr bullet loads.  My older gun, TDE North Hollywood, starts jamming at 28 gr and works real well at 28.5 to 29 gr for its loads.  Not surprised you had problems with that one.  I think the rest of the loads are on the light side as well.  This is not too far from what I have seen with my gun and it is old and well shot so a new gun will likely be a bit stiffer and require more than you loaded.  I think there are some here who have stated the SBR stuff is pretty hot and I know that was a prime testing ammo for the new guns.
When you are up to your neck in alligators it is hard to remember your original intention was to drain the swamp
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TonyRumore View Drop Down
180 Auto Mag
180 Auto Mag


Joined: 13 Apr 2020
Location: Oklahoma
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Points: 30
Post Options Post Options   Thanks (0) Thanks(0)   Quote TonyRumore Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2022 at 4:51pm
It's Kent Lomont.  Not Lamont.

Tony

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pbcaster45 View Drop Down
180 Auto Mag
180 Auto Mag


Joined: 19 Feb 2019
Location: Oklahoma
Status: Offline
Points: 26
Post Options Post Options   Thanks (0) Thanks(0)   Quote pbcaster45 Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2022 at 2:56am
I shot ten test rounds thru the gun tonight and it functioned 100%.  You live and learn!  Lube, lube, lube!

Much easier to pull the bolt back too.
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pbcaster45 View Drop Down
180 Auto Mag
180 Auto Mag


Joined: 19 Feb 2019
Location: Oklahoma
Status: Offline
Points: 26
Post Options Post Options   Thanks (0) Thanks(0)   Quote pbcaster45 Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2022 at 6:22pm
Forgot to mention, those were ten SBR Factory loads.
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