Louie: Before you spend more money, one way or another- a 20 gauge is minimum gauge for turkey in Illinois-- take a look at this post several months ago that produces much denser patterns from a cylinder bore shotgun.
http://www.muzzleloadingforum.com/...d/245826/post/847484/hl//fromsearch/1/#847484
If you scroll down the page, more information is shared by Capt. Fred, and Makesumsmoke as the discussion goes on.
Bill Martin( BillnPatti) subsequently did his own testing with his shotgun and fabric patches, using thicker, Mattress ticking fabric, and found he got much improved patterns, too. These fabric cups work properly because they are NOT folded over at the top, but are cut even with the muzzle. A standard OS card is placed on top of the shot just as if the cup was not present.
The Benefit of this idea is that it cleans and LUBES the bore as the shot load is run down the bore, then protects the bore from leading when the outer pellets would normally rub against the inside of the barrel. That keeps the lead shot MORE ROUND, rather than rubbing flats on some of the pellets, leaving them in the pattern. And, because the shot load flies a bit further before the fabric cup releases the shot, the patterns are tighter down range. Capt. Fred says his pattern was half the diameter at 20 yards that it is without the cup.
I don't believe its possible to get good 40 yard patterns, much less at longer distances, with the velocities you can achieve shooting black Powder. Black Powder makes these guns, choked or not, limited to about 40 yards, whereas some smokeless powder shotgun loads will give good patterns well beyond 50 yards. DO NOT EXPECT to get that kind of performance from any black powder shotgun. Hunt Closer. You have already demonstrated that you are capable of getting close to game. Stick with that game plan, and you will get plenty of game.Turkeys are called into decoys all the time, and shot inside 20 yards. 30 yards is probably a good average, and where you should plan to limit your shots with your BP shotgun for best results.
I had a good friend who once killed a pheasant at a paced-off 60 yards, in front of skilled shooters as his witnesses. When they cleaned the pheasant, they found ONE pellet had hit the bird in the back of the head! Not another pellet struck the bird. He laughed every time he heard someone claiming that they could kill pheasants with their shotgun out to 80 yards! Study any Edition of Lyman's Shotshell reloading manual, where they have posted tables on Muzzle velocities, and then followed the shot out to 20, 40 and 60 yards, then give you pellet energy at the various yards, and time of flight, and drop in flight for the distances.
None of the BP loads I shoot are as fast as the slowest Smokeless powder loads shown on the tables, but you can extrapolate information from the tables that will tell you what is happening to YOUR BP loads in flight. Take a look, for instance at the fastest MV shown for the shot size you want to use, and compare what happens to it in the first 20 yards with the slowest load of shot shown. Lyman's Black Powder Handbook, second edition, has some good loading information in it for you to use in deciding on a turkey load, and whether you need to have a choked barrel. :thumbsup: