Hello everyone!
I have been shooting a 320 gr bullet in my 38-55 Highwal using 17-17.2 gr of 4759 with good results .

However, I would like to try a 300 gr bullet, so far results with 17 or 17.2 are not that good. My collection of reloading manuals is surprisingly weak on 4759 load data, even the real old ones, and they dont offer anything for 300 gr bullets. 
I would like to bump up the load a little bit but do not want to end of with my rifle in a dozen parts that dont fit back together. 
If anyone has any reliable load data with 4759 for a 300 gr bullet ( or 320) I would appreciate it if you could share it with me. 

Thanks!
Joe S

My best load with my 38-55 breech seated in if I remember right a 16 twist and a 296 gr Paul Jones spitzer is 16.6 of 4759

Charlie I like 4759 too & have a good supply, laid in on your advice years ago.

It’s true 4759 does not meter as well as it’s usual replacement 4227. But after using a lot of 4227, if in a situation when every shot counts I throw 4227 into a scale pan & check weigh. Have the best measure and while nobody’s perfect I can run it pretty well.

Check weighing, scale set on desired charge, does not balance, dump that charge and throw again. 4 x 60 round boxes = 240 fixed cartridges for our club offhand matches, will catch several even half a dozen that dropped light. Almost always from operating the measure too fast. 

Match is generally won by a single strike or goes to shoot off were every single shot counts. Good as some powders measure, I don’t trust them when it counts. Might as well use up my 4749

Boats

Belding and Mull measure is 4759's best friend.

oneatatime wrote on Aug 5^th, 2023 at 12:42am:




I may be all wet on this but all I've ever seen for YEARS  is IMR SR4759.And I've burned it for 40 years.If maybe IMR once didn't have the "SR" on the lable I didn't notice and for sure  didn't see any difference .

I have a can old the old original DuPont "Sporting Rifle " 4759 somewhere though.I think that first rendition was dropped when I was in middle school in the mid 70's.Dad had some that  I pilfered that he hoarded till it got brought back in the 80's?? again. 

I have a 4 lb. keg, and a 1 lb. container of 4759. I purposely do not work up anymore loads using 4759 anymore as I want my current stash to only be used for guns I've already got loads worked up for. So anything new gets loaded with other powders that are still easy to find.

CBAshooter you gave half an answer with your second pic. Notice that it says DuPont Sporting Rifle (SR). Here's a vintage DuPont can that says DuPont Improved Military Rifle. In 1920s Military Rifle was improved and marked Improved Military Rifle. Sporting Rifle 4759 was always SR 4759. In the second pic you can see the progression of can markings until DuPont was sold and the logo became IMR for no good reason except that the most popular powders were the IMR ones like IMR-3031 and the 3 remaining SR- powders faded away. However in company reloading data even in the 1960s showed loads for the SR powders and then listed the IMR powders separately. Maybe you weren't reloading in the early 60s.

oneatatime wrote on Aug 5^th, 2023 at 3:44pm:

  The blurry pictures certainly don't clear up the subject; but that isn't necessary when "straining at gnats".