Well, given that I'm having trouble getting virtually all the powders I use, and that I needed something to load in my 416 Rigby, I bought an 8lb canister of IMR 7828 SSC. It seems a good substitute for RL22 in the 416. (see earlier posting.)
Since there aren't many loads listed for this powder, I will perhaps extrapolate (carefully) RL22 loads for other cartridges.
One of the cartridges I load for is 7mm-08. I ususally load 47.5gr of H4350 under a 140gr TSX. I haven't found any RL22 loads for this cartridge and bullet weight. Anyone have any data for 7mm-08 using RL22 or 7828? It is used for .243, which is a similar cartridge.

you probably won't find much for the 7-08 with 7828 because it's so slow and not needed even with the heaviest bullets in 7mm. you're not seeing allot of load data for 7828 because there actually aren't many applications that really need such a slow powder. another reason would be that the 7mm.bore and the .308 case volume is very nearly ideal in balance( niether over, nor under-bore), much the same as the 7x57, so most powders of a medium burn rate will work well with many bullet weights.
as the bore dia. goes down in comparison to case-volume, the need to push easily on heavy bullets goes up and with the .243 the bore dia. is small enough( in relation to a .308 case) that a 100 gr. bullet is somewhat overly heavy for the bore, so some loads using a very slow powder start to show up.
i would suppose you could extrapolate loads as long as they result in a fairly full case. the 7828 is so slow that i don't think you could get in trouble as long as the case is near full..... you just won't see any neck breaking velocities from them.
using good hot primer might be helpfull to ensure that all the charcoal lights up......

7828 is pretty slow powder. Not quite as slow as H1000 or RL25 but pretty close. I have seen loads for even the '06 for 7828 but that was only with the heavy bullets. I'm pretty sure you can find a load that is suitable for pressure and speed but it will take some looking around. To give you an idea of it's ideal uses, I use it to reload for the 257 Wby and the 338-378 Wby. Both overbore cartridges.

Ken....

In typical rifle cartridges of medium to large capacity, IMR 7828 (and the same in SSC) is about 2 to 4% slower than H4831; in other words, if a cartridge uses a 50 grain charge of H4831, then it needs a 51-52 grain charge of IMR 7828 to equal it.

While RL-22 is typically a tad slower than H4831, I'm hestitant to draw any similar direct correlations between it and IMR 7828 because (1) being of different chemical compositions their burning characteristics differ, and (2) RL-22 has a reputation for signficant varitions between lots. However, if you are using, say, 60 (70, 80, 100) grains of RL-22, then you should safely be able to substitute a similar amount of IMR 7828 and likely work up from there.

I use 7828ssc in my 7mm Dakota, 280 & 260ai. It works well in those applications. I treat it like RL22 & find it just a tiny bit slower. I've even played w/ it in 180gr 06 loads w/ some success. I think it a bit slow for the 416rigby but certainly would give lower pressures. I don't see why you couldn't work up 150gr loads in th 7-08. I use it for 140-160gr in the 280 & 120-140gr in the 260ai.

I use the 7828 in the 6 Rem with 107's in a 1 in 8 twist. Also in a 6/284 1 in 10. As mentioned above similiar to R22 as a starting point, but slower in most all applications. Fine accuracy and good deviations.