I used to think 4759 was slower than 4227 however when I switched my 38/55 Club offhand match loads to 4227 (Cause I load 6x60 round boxes at a time and the 4227 measures easier) found I needed less 4227 by about a grain to shoot to the same sight settings as 4759

And agree no residue in the bore it's too hot. When I recommend 4759 to new single shot shooters all say they don't like the bore residue.  I don't think it's a problem at all.

About the only measure I have found to throw 4759 well is the Belding and Mull, and found it out after I had switched to the Harrels measure & 4227  Lot of trouble to change powders and am getting good results with 4227 will stay with it. Still think 4759 is more accurage and for sure the better powder for larger cases like 45/70 no doubt due to it's speed.  Real problem with the very large cases is getting adequate burn in a large space with light or little bullet pull.


Boats

Fitz 

I think any load is going to do best if settled the same way every shot. Some more sensitive to it than others but all less than case full loads it makes a difference

It's real important to mount the gun same way every time anyway which counters the powder sensitivity to position.   

Baseball pitcher Golfer hitting a ball. Casting a Fly rod wind up consistency is key to hitting the target, Rifle no different.

Boats

I have only shot a relatively small number of 38-55s, but with the 45-70, I've shot enough 4759 to know it works well.  I still don't have any serious accuracy loads developed for it, though.

In the 32-40, 4759 has long been my go-to powder, but unlike Brother FITZ, I shoot it in VERRY light loads.  I  have shot 13.6 grains for years (both fixed and breech seated) with very good results for over 20 years.  I found that a fairly stiff load of 4227 worked better in fixed loads, though.

Froggie

Boats, my charge is a starting load!  Note that FITZ is shooting almost 2 grains more in his 32/40, so mine really should be safe for any solid high wall.  I've used it for literally hundreds of rounds through that original high wall of mine that I think you've seen a time or two, with bullets from 165 to 200 grains.  I very seldom give loads, but that is one I feel very safe to "prescribe!"

Froggie

Gentlemen;

Shooting Accuracy and Shooting Safety are mutually inclusive objectives; meaning to pursue accuracy at the expense of sacrificing safety, is a foolish endeavor.

The preceding posts offered in the thread all originate from our most experienced, responsible, and well grounded marksmen (Boats, Green Frog, Fitz, Etc.), so I find comfort in that offered guidance.

However, my single shot 38-55 is on a Wickliffe '76 falling block action, which has been held out by the original patent designer to be a SAAMI high pressure capable action.  Not indestructible, but high pressure capable. 

CMM

40_Rod wrote on Mar 17^th, 2013 at 8:45am:


Quite by accident I discovered that my Ideal #5 Measure with micrometer adjust handles the sticks of IMR 4759 pretty well (read "consistently") and since I had already bought it because it looked so cool, and since it's so important to me to look good on the bench... the rest is History!  Glad ledball provided me with a supply of old 4759 in the pale green cans and RussW hooked my up with a 6# jug.  I'll be able to shoot my 32-40 high walls until I'm old and grey... wait a minute, I am old and grey!  Well then, I'll probably be able to shoot them as long as I can still hold them up or lift them onto the bags! 

One of the strong points of 4759 is its lack of position sensitivity.  Another is its burning curve which allows a more steady push rather than the sudden "slam" of some powders upon ignition.  Also it's bulky enough that a true double charge is highly unlikely.  What's not to like about it? 

Froggie