Take a look at my Elliptical Minigroove bullet, second from the right. It is 1.325" long, Wt 367 gr,it will stabilize and shoot very well out to 1000yds in my 16 twist 40-65.  Shoots into minute of angle. Shot 88/100 at 1K and 99/100 at 800yds.
Also, if you are into Paper Patching, the third one from right
is my Elliptical PP bullet made for the 16 twist 40s. Also a minute of angle bullet. 1.325" long and 373 gr.
beltfed/arnie

40-65 with 57.0 grs Swiss 1.5F using Pioneer 40902445.
Casts 446 grs & holds over 1 gr of lube. Good out to rams & turkeys.

Firstly thanks for the replies, all this stuff about the right length of bullet relative to the barrel twist just confuses me.
Let me put it this way, would a bullet 1.450" long be better in a 1-16 twist barrel than one that was 1.350" long ?.
Beltfed/Arnie
I have had very little experience with paper patched bullets other than in my 45/90, at the short distances I was shooting I could not get the PP bullets to shoot any better than my greasers. I have absolutely no doubt that with more experimenting this may have changed. I can fully appreciate the advantages of the smooth projectiles at the longer ranges from an aerodynamic view, but at 100 and 200 meters maybe not much of an advantage perhaps.
You make mention of some of the bullets shown as being MOA bullets, is this with smokeless, or BP ?.
Presently I'm using between 71 and 72 gr of either Swiss 1.5 or Wano PP, the 72 gr Swiss load gives me an average MV of 1344.4 fps with a spread of 42 fps, the Wano 72 gr load gives an average of 1249.8 fps with an ES of 37 fps.
For comparison the Wano load shot a .840" five shot group with  the best four going into .675". the Swiss group measured 1.120" with the best four going into1.090", as conditions were far from perfect with a moderate wind from 7 o'clock the difference in group sizes could have just been a result of the wind variation, or my complete lack of wind doping ability.
Schuetzen Dave'
You mention the Paul Jones bullet, I was under the impression he was no longer making moulds, so was yours a copy of a PJ design or what ?. If it was a copy, who made it and was the quality equal to an original PJ mould, I have two for the 45/90 and one for my 38/56, all of which cast bullets so lovely that I hate to shoot  them.
Mike.

Beltfed.
My case will only hold 72 gr of PP Wano if I carefully drop tube it down a 24" drop tube, I then press a .060" veggie wad on top of the powder with thumb pressure. This puts almost no compression on the powder at all.  What advantage do you see in shooting your PP bullets in fixed ammo as opposed to breech seating them if you were only going to shoot at 100 meters, and wiping between shots was OK, there being no time restraints.  We have an analytical laboratory here in Canberra and I'm going to see if they will analyse a sample of the Swiss 1.5 for me to determine its composition. I'm having a hard time trying to figure out why a coarse 1 1/2 F powder should have so much more power than a finer grade like 2F Wano, perhaps there might be a dash of something else in the mix maybe. Anyway apart from all this what would your recommendation be for a greaser to try instead of my current BACO 415 gr Money bullet,  keeping in mind that it would be desirable for it to be tapered in some way for ease of breech seating.
Mike.

Mick B,
See attached drg of my 367 grain Tapered Elliptical Minigroove bullet. It is  taper designed and fits "way out" in the freebore/leade/barrel in typical 40-65 chambers.
Indeed, in my rifle the bullet finger seats only about0.125" into fire formed brass. You ask "why not breech seat?"
I have so far mainly shot mid and long range BPTR and gong  matches where there are time constraints and so "fixed" ammo is handy and quick. 
I am loading  the ctges only with powder and 0.060 LDPE wad seated to that 0.125". 
Then, just before I go to the line, I finger seat the bullets carefully as I put them in my line loading block.
OH, I had Steve Brooks cut this Elliptical Minigroove bullet mold
You are welcome to use my drawing of my 40 cal EMini
bullet, with appropriate diameter tweaking to suit your fully
breech seating them.