12 Bore rifle project

[OrenT]

I just found this thread and am working on the same type project with the same basic gun. How have you progressed?

[W.R.Buchanan]

All I see here is pain,,, and plenty of it.

A 2.25 oz. slug at 1000 fps from a 6lb gun? Do you have any idea how much recoil you are talking about?

This gun needs to weigh 12lbs + just to be able to shoot it twice in one day.

The British 12, and 8 bore double guns, some fully rifled and some with Paradox barrels where only the last two inches were rifled, weighed upwards of 16-18 lbs.

You needed cajones about that big to pull the trigger on one of those guns. The 8 bore guns shot boolits weighing 1250 gr.

I applaud your idea, however if I was you I'd let someone else fire that gun the first time.

On another note,,,, It might be a good idea to work your way up to those loads, slowly,,, and stop when you can't take it anymore.

My .02

Randy

[omgb]

I built up one of those H&R super slug guns. I think I have a thread on it here somewhere. I called it the .73 caliber Talleywhacker. I had RCC make me some custom everlast 12 ga. cases 3.5" long. I had done a lead slug of the chamber and throat and found that a 3.5" hull was the way to go. I then had a custom mould made for a 1300 grain +/- .730 cal slug. I cast it 1/20 tin to lead. I use 150 grains of 2F compressed, a 11 gauge over powder card wad, two greased felt wads and I do a light roll crimp on the case mouth. Recoil is brutal but not impossible. However a 300 yard gun? No way in heck. This thing is a 50 yard gun with 100 being the max I'd try and hit with it.

[BAGTIC]

It seems to me that it would be better to stay below transonic velocities. Most bluff nosed projectiles experience incredible drag as they approach Mach 1 and it doesn't improve much until well into the supersonic region. Below transonic the drag remains remarkably stable throughout the flight regime. With such a heavy projectile high velocity would not be needed to assure deep penetration. The effectiveness of the old big bore guns depended on heavy high sectional density bullets not high velocities.