10ga loads ?

[10 bore]

Originally Posted by Paul Harm

Dave, I wouldn't rule out the step at the end of the chambers. I've cut all my shells to fit the chambers so that shouldn't be a problem. The step in my gun is very small - I'd have to guess it was intended for brass shells. I believe some call a gun with chambers/step a " chamberless gun ". There are no forcing cones. The bore is the same size as the inside of the shell. It would seem to me there'd be less recoil. But then again I could be wrong and there's something else to guns with stepped chambers causeing more recoil. Paul

hi, all 3 of my 10's have stepped chambers, i find them very ez on the shoulder when i am shooting. much better than a 12 ga. with a 1 1/8th oz load. some thing just does not seem wright if it kicks like you said it does. please keep us posted. scott

[Paul Harm]

Finally remembered to bring home my other dial indicator - it only reaches in 5". The step is .020 - a couple of brass 10ga shells measure .010 wall thickness with a .800 ID. Far as I can tell the bores are .800 . So it should be a smooth transition from shell to bore. The plastic wads are just under .800. I just don't know - it doesn't make sense. A friend has some 7625 - try a couple of shells with it. Paul

[Paul Harm]

I just tried some loads with 28grs of 7625, Rem wads + 1/4" filler wad, and 1oz of shot. Clean barrels and acceptable recoil. Here's something I can shoot. Paul

[J.B. Books]

Originally Posted by Paul Harm

I just tried some loads with 28grs of 7625, Rem wads + 1/4" filler wad, and 1oz of shot. Clean barrels and acceptable recoil. Here's something I can shoot. Paul

If this load is comfortable to shoot then the forcing cones were not the problem as they would effect every load. Something was amiss and it's good you stopped and adjusted.

[Paul Harm]

Amen to that - although there are no forcing cones. Thinking about it, it would seem that the stepped chambers would be the cats meow. Some promote longer forcing cones and with stepped chambers there aren't any at all. Don't get much better. Paul

[J.B. Books]

The cat's meow is probably the other direction. An English gun I saw this year at a Vintagers shoot, a 10 bore with 12ga chambers. No limit on shell length. Nothing being forced. Seemed to shoot real tight too.

[Double Lab]

I have a Wm. Ford 20ga. hammer. Built on the "Heath chamberless system". Barrels have 20ga. chambers, 16ga. bore and 18ga. chokes. It is so stamped on the underside of the barrels. No forcing cones, extremely mild recoil and F/F chokes. It ain't a 10 but the principle is the same. These Brits figured this out over 130yrs. ago and if I ever have a gun sleeved again this is what I will have done.

[charlie cleveland]

that is one serious 20 ga gun...how do figure that a 20 ga gun with 18 ga bore is full choke...i m not making fun i just dont understand...can some one explain please.... charlie

[Double Lab]

Charlie;
The reduction in bore diameter is what gives this gun a full choke. A 16ga. bore is .662, an 18ga. is .637. The difference is .025 which is a fullchoke in a 20ga. The same principle applies to any gauge. Take the 12 ga. for example. Nominal bore dia.= .729, a constriction of .036 would give you a diameter for the choke of .693 which is the diameter for a 14ga. The Wm. Ford 20ga. chokes are parallel for the entire length of the choke (3.75").
Hope this helps.
Daryl

[Paul Harm]

I ended up not liking the loads with 30grs of 7625. So I did some test loads - 20, 22, 24, 26, and 28grs. The 20 and 22 were mild and the 24 wasn't bad. No to the 26 and 28. Did another two loads with 22.5grs and 1oz and 1 1/8. Funny, the 1 1/8 felt better than the 1oz. Gonna load a couple with 1oz and a couple with 1 1/8oz to see how they break clay birds and check for recoil. Back when I loaded 1oz in the 12ga the loads were mild, so why not in a 10ga ? This is really bugging me - shouldn't be any recoil with the 1oz in a 9# gun be it 10 or 12. Paul