RST powder for lite 10 ga and lite 2 1/2" 20 ga.
 

Does any one know what powder RST uses for their 2 7/8" lite 10 gauge 1 1/8 - 1 1/4 loads? It is approx. 25 grains of a very find flat spherical powder and also for their 2 1/2" lite 20 gauge loads. It is also a very fine flat spherical powder @ about 16.4 grains

Thanks Kensal, are these star or roll crimp?

I still have some 57s and 97s.

J.B. Books, I have a 1969 Lyman Shotshell Handbook, (first complete edition) with some 10 gauge 2 7/8" and 2 3/4" loads. It has field loads for both lengths and buckshot loads for the 2 7/8". All the 2 7/8" loads are in Remington SP plastic hulls and the 2 3/4" loads are all Canuck paper hulls.
The only powders used are SR7625, SR4756, PB, and AL-7. The buckshot loads are SR7625 or PB. If you're interested in the loads I'll take it into the office and scan and post the data. It might take several days until I make it in though.

Bob, how many grains of 7625 are they showing for thier buckshot loads. Thanks Dave

Dave, they range from 36.5 to 38 grains. Each load is for a specific size of buckshot.The 38 grain load is only to be used with 34 pellets of #4 buck, the 37 grain load is only for 34 pellets of #3 buck, ect. The 38 grain load is 1325 fps. A 38 grain load of PB with 9 pellets of #000 buck is 1405 fps. All the short 10 loads are roll crimps.

J.B., have you ever looked at the Gun Digest Book, "Reloading for Shotguns"? I have the 5th edition and it has a half dozen field loads for the 2 7/8" 10 gauge that use Herco, Unique, IMR 800X, and Universal. Not many loads, but one with 1 1/4 oz. of shot and 36 grains of Herco is 7050 psi. Looks like a useful load in the old girls. There is also a half dozen buckshot loads using the same powders in the 2 7/8" as well. At least the components for these would still be available.

This would be great Bob. I am in the process of putting together an Excel spreadsheet with any printed information for 2 7/8" 10ga. So far I have data from Speer #7, Hercules Powder Guide 1968, Lyman 2nd and 3rd editions, Handloader #81, Handloaders Digest 97, Ballistic Products Deci-Max (VP100), Dupont Powder Guide 1965, Nice Shot, plus a couple of loads posted here. I am awaiting arrival in the mailbox of further vintage guides from Hercules and Hodgdon. Although some of the components are no longer available, Rem SP hull, 57 primer etc. These loads give some ballpark ideas on what powders will work and an idea of how much powder to use. It's then up to us to develop and test what we put together. I'll be glad to share when it's more complete and appreciate any info you can send along.

The 1968 Hercules Guide has 3" 10ga with 1 1/4 ounce loaded with 42 grains of Herco at 1360 fps. No hull or primer specified, no reported PSI, I am assuming roll crimp for lack of info. This sounds like a real "screamer" probably near SAAMI max pressure. Good to see such comparisons.

TTT. My spreadsheet is coming along and I am impatiently awaiting the mailman each day for my vintage reloading guides I purchased with hopes of further updates. If anyone has something to contribute please send along, I intend to share my spreadsheet with everyone here when complete. Thanks.

JB:
The 10-bore loads I contributed were both folded crimp. I suppose a roll crimp could be substituted and a little less pressure generated.

Best, Kensal

this may be of some value to yu all. www.cornellpubs.com Abby has reprints of lots of the old reloading manuals and some originals. just go to the web site and scroll down on the left till you get to reloading ,click on it and your in heaven. Hope this helps.