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View Full Version : Latest project,,, another big bore



Polar_Hunter
05-10-2016, 06:20 AM
Turning an old 12 gauge single into a big bore rifle. The sleeve is a turned down .577 Snider barrel.

Rory McCanuck
05-10-2016, 09:10 AM
Nice!

Polar_Hunter
05-15-2016, 10:38 AM
http://www.gunownersofcanada.ca/attachment.php?attachmentid=1498&d=1463330249&thumb=1&stc=1


Ready to test fire,,,, (Tuesday I hope)

lone-wolf
05-15-2016, 10:50 AM
haha cool

tinbird
05-15-2016, 04:46 PM
Is it a full length sleeve?

Polar_Hunter
05-15-2016, 06:03 PM
Is it a full length sleeve?

Yup, I managed to get a very stiff hand push fit and bonded it with Locktite. Started making a few test loads today. As with the Snider I'm using 24 gauge Magtec brass but rather than cutting it to Snider length (2") I'm leaving it at 2-1/2". In this way I won't be able to mix them up and possibly load a "hot" round into the old Snider by mistake.

Polar_Hunter
06-19-2016, 06:37 AM
Well I got it done and it shoots. The next job is load development. The low comb on the shotgun stock was impossible for the use of optics. As the butt stock had been broken and repaired I decided to build a new one. It is ugly but I get a good cheek weld.

A short video,,,, https://www.youtube.com/watch?v=gpmTQbSrru8

Rory McCanuck
06-19-2016, 11:19 AM
You almost need a step ladder to see over that comb ;D
But hey, if it works...

It looks as though it'll shoot.
What range?
What was your load?

Polar_Hunter
06-19-2016, 01:52 PM
You almost need a step ladder to see over that comb ;D
But hey, if it works...

It looks as though it'll shoot.
What range?
What was your load?

The day that I took it out I only had 10 cartridges loaded (got more brass since). The mild load of 700X pushed the 560 gr slug at 800 FPS. After sighting adjustments the last 5 shots made the group in the photo at 50 yards. A 4" group including the "flier" which I'm sure was my fault. On to load development now. With the shallow, slow twist, rifling I expect that accuracy will only be good up to about 1200 fps. Still, devastating destruction at 100 yards with that heavy bullet.

Rory McCanuck
06-19-2016, 05:44 PM
Heck, even at 800 fps an ounce and a quarter of lead is still going to leave a mark.
With a slow twist, accuracy might actually improve as you speed it up.

Edit: Not that there's anything to complain about with the group you got.
Didn't want that to sound wrong :o

Polar_Hunter
06-23-2016, 09:34 AM
Making progress,,,,,

https://youtu.be/pJ0izgVrwbQ

Rory McCanuck
06-23-2016, 10:42 AM
;D

Considerably more recoil with the hotter load than the 8grain load.
Great vids.