You were not clear on what it was. From your handle I would guess a .410. If so I built one with a Douglas barrel on a Moslin action for a deer gun. I was planning on useing brass cases so I chambered it in 2 1/2 in. which would be the same as a .405 Win. Problem is the State of Ohio won`t let me use all brass cases. I rechambered it in 3 in. Mine has a .411 bore and does not like the .410 jacketed pistole bullets. I like the Lead Head hard cast gas checked bullets and they shoot very well, at least in warm weather. I just use a Lee dipped # 205 and use AA 8700 powder and put a normal star crimp on the case. This powder is way to slow and leaves alot of unburnt powder in the barrel, but pushes a 240 gr. bullet at near 1,300 fps. which is a real nice deer load and the grandkids have no trouble with recoil.