i've been using single shot rifles(tc encore and h&r handi) for hunting deer for years now.  i have been using my encore in 444 marlin and 500 linebaugh(both are 23" barrels) and 45-70 handi on cast boolits for about 5 or 6 years. i'm not a "go faster" guy. i'm more of "eh, it'll get there.....eventually" guy. i'm also a handi cabledle guy too. i had a stroke and right arm is useless and my right leg is 40% capabled, means i'll walk there.......eventually . it also means i won't do the work (gunsmith, i hope) on rolling block.

and that will be my question(s).
will a rolling block work on a 40-65 win?
i want to use a 350-400gr fn  and smokeless/ bp?
1400fps and under will be it. i'll be happy with 1200-1300fps. 
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or a real rolling block.

i am looking a marbles sights, but i'm open to suggestion(includes the rifle)
i don't have anything yet, i'm just spitballing the idea.

I had a 40-65 built on one of the Dane rollers that were imported in about 15 years ago. Used a #3 winchester profile Green Mountain barrel. It shoots bullets from 300-410 gr pretty well.

I really like the .40-65 in a single shot, at least with black powder.  I shoot a Shiloh Sharps in .40-65 with a 1:16 twist barrel.  It shoots the Saeco #740, and Buffalo Arms 409400M4 bullets extremely well from 200 to 600 yards.   Those are both 400gr-ish bullets.   

I like it so much I bought another one, but with a 1:14 twist barrel.  I haven't developed a load for that one yet.

Chris.

Very nice!

Chris.

Todd,
I would not waste my money on the increased cost of the Honed GM barrel. For your purposes the std GM barrel
will do just fine. 
Indeed, the 40-65/ 16 twist will do a nice job w/o excess
recoil. Just stay with moderate weight bullets.
beltfed/arnie

All good suggestions above. Based on your physical description the 38-55 suggestion is a good one. Even a 38-40 or 35-40 would work well, but they are more of a hassle to make brass for (the 35-40 being the easiest - just resize 38-55 brass). A GrnMtn #3 profile barrel would shoot any bullet you might be interested in with either BP or (ugh) smokeless. If you are new to BP loading, shooting, this is an excellent tome to get you started (along with asking questions here & on the Shiloh Rifles forum): (You need to Login or Register to view media files and links);
There are a number of excellent single-shot gunsmiths on this forum who could do the work for you. One is singleshotsam (Curt Hardcastle) who posted the pic's above, and another is buchsenmacher (Steve Durren), but there are others. Tell us where you live and there may be one just across town you are not aware of.
Another group/forum that might useful to you is the CBA (cast bullet association - google them). They shoot a wider range of rifles and competitions that you may like.

40-65 is a great round. Shot one for the past several years and thoroughly enjoyed it before moving to a 38-50 for this season. Easy round to load & shoot and not punishing in a long match. Accurate and capable to 1000yd. Used a Grn Mtn 14.5" twist barrel and it was very accurate.

You are about as centrally located as you can be for BPCR shooting in PA. Ridgway Rifle Club is due north, Shippensburg Field & Game is ESE and McDonald Sportsman's is due west. All under a 2-hour drive. Reade Range is only about an hour north of you and usually has a long-range BPTR match each year. Come on out and join in the fun. Everyone is welcome.

Steve Durren is in Adrian, MI and would do a terrific job building a 'Roller in 40-65 for you. CPA rifles in Dingman's Ferry, PA will make up 95% wood for a good price (but, you can spend as much as you want on fancy wood). They might also do the work, but generally stay so busy building their own CPA rifles that they don't take in other work. But, you could ask. Another excellent single-shot gunsmith down by Winchester, VA. He stays pretty busy, so not sure about his taking on your project. All the other single-shot gunsmiths I know/use are out west.

If you re not set on having one made, and would  considewr ready made i have been enjoying my pedersoli RB in 40-65 with pistol grip and DST for years  it shoots bp and smokeless well and i enjoy a light 265 grain bullet available commercially or you can get the magma mold for about 100  for 200 ys offhand gong shoots