The 33-40 simply uses a basic unmodified 32-40 case. The 33-47 is a 32-40 case blown out to 33-47. CPA has both so you have to be careful about which one you request. A 33 bullet would not fit into a 32-40 case nor would it fit into a breech seater case. That is why you would want to make it clear that you want a 33-47 and not a 33-40.

At this point I have none of the above and since I would like to try fixed ammo it would force me to a 33-47. Now trying to have it for both fixed and breech may be a pipe dream. Just as a Fixed vs breech seating bullet will be different. Years ago when I was competitive the accuracy difference would have mattered. But now I want to enjoy and don't think fixed ammo will be detrimental to my 210 level scores. Advice always welcome since it has been awhile and I don't want to  by two reamers and two bullet molds.

Thank you,
Charles

My Briesen 33-47 was the most accurate and user friendly competitive rifle that I have ever owned to date. Barrel was a 15 twist Breisen left hand twist, bullet a 234 grain Moss Spitzer, load 14.7 grains of H-108 and or AA-9, Rem. 91/2 LR primers and being breech seated. I believe your choice to build a 33-47 for yourself while shooting fixed ammunition is a very wise choice indeed. Unfortunately I cannot be helpful on your reamer design. Shooting fixed while using the 33-47 is something that I have never been personally involved with. But I do believe in order to have a reamer designed it has to revolve the bullet itself. 33 bullet moulds unlike the 32 are extremely hard to come by so the option of trying different bullets is extremely difficult to do. Also when ordering a reamer you should know the bore and groove diameter of the barrel. And I would also highly recommend getting one with removable pilots. What you might have to pay to have a custom reamer made can often times be recouped if deciding to sell it when you are done with it. Or you might have to take a slight lose my custom Manson reamer was 220.00 dollars but it was also exactly to my specs. I have used several made by others and the Manson has been by far the best so far.