I'm looking for some of the older data published by DuPont (now IMR/Hodgdon), back when they still listed 220 gn RN loads for the .30-40 Krag. Today, they only bother to publish the 150 and 180 gn loads. The old NRA handloading book copied DuPont's 220 gn data but only for 4064. For reference, this data would have been shot in a 25.5" pressure barrel, the same length used in the current IMR books. I'd like to know the charge weight, fps, and CUP they listed for 4350 and 3031 (and -- if you enjoy typing -- 4831 and 4759). Thanks.

Not an NRA book but I have an old Sierra manual for 220 grainers.

Low End ----------------------- Max
IMR3031 31.5-1800fps --- 34.8-2000fps
IMR4350 38.2-1800 --- 44.4-2100fps
IMR4831 40.1-1800 --- 44.4-2000fps
H4831 43.2-1800 --- 47.8-2000fps

No data for 4759

Here is some info from the Hornady Third Edition for the 220gr Hornady RN #3090 in a 30" barrel with a 1" in 10" twist. They used Remington cases, Fed-210 primers with an OCL of 3.080".:

..................1600fps.....1900fps.....2000fps.....2100fps
IMR-3031....27.5gr........32.7gr
IMR-4320....29.7gr.........................35.6gr
IMR-4064....29.3gr.........................36.0gr
H4895........30.0gr..........................36.3gr
H380..........31.4gr........36.0gr
IMR-4350....34.5gr...........................................42.0gr
H4831........37.0gr............................................43.9gr

I notice a few Powders listed above that "appear" to be slightly out of place with the Pressure Data I've seen in other cartridges. I know that sometimes happens, but I'd still be skeptical with some of the Loads and their relative positioning.

But this is what Hornady had back in the 1982 printing.

Lyman circa 1957.

4198, 27gr. 1775 fps., 25gr. 1625 fps.

3031, 37gr. 2130 fps., 31gr. 1850 fps.

4064, 39gr. 2100 fps., 33gr. 1775 fps.

4320, 39gr. 2190 fps., 33gr. 1695 fps.

4350, 44gr. 2300 fps., 41gr. 2145 fps.

Unique, 14gr. 1200 fps. Not IMR but ????

roger

Lyman circa 1990

3031, 32gr. 2004 fps., 36gr. 2074 fps.

4895, 36gr. 1992 fps., 40gr. 2183 fps.

4064, 36gr. 1897 fps., 40gr. 2127 fps.

4320, 35gr. 1882 fps., 39gr. 2079 fps.

4350, 41gr. 1934 fps., 45gr. 2127 fps.

H 4831 50gr. compressed, 2096 fps.
roger

My thanks to all of you for the replies.

The fps spread in the older 3031 data demonstrates, I think, pressure barrels weren't generally used. I recall reading most of the older load books were developed with a mixture of case expansion and guesswork. DuPont was one of the few labs using pressure barrels. Not that pressure barrels are the last word: look at some of the older data published by Hercules (see P. Sharpe's big book on reloading). Even within the current IMR data, there's some suspicious stuff. I think I'll stick with 4064 for the reduced 220 gn loads, but maybe someday I'll find a copy of the older listings from DuPont at a gun show.

"Complete Guide To Handloading" Philip B. Sharpe copyright date 1953 lists several loads for the 220 and one for a 230 lead bullet using Du Pont powders: 220 gr bullet 37grains 3031 @ 2000 fps. 27grains 4198 @ 1755 fps. 41grains 4064 @ 2135 fps. 39grains 4320 @ 2055 fps. and a 230gr lead bullet loading of 12.8grains of SR 80 @ just 900 fps. Please use for reference only! There are several other listings but I'm not sure if the other powders are available anymore. Goodluck and be careful. Rodney.