hello,
90gn 100gn speer sp and reloader 22
all advice welcome.
kind regards
swath

Start at 44gns with the 90 gn and 40.5 with the 100gn .
Maximum 46.5 gn with the 90 grainer and 45 with the 100 grainer.
Above from sixth edition of Nick Harvey's Practical Reloading Manual .

90 grain:
RL-22 From 40.0 grains to 47.0 grains
Remington 9-1/2 Primer

You might want to try:
RL-19 From 39.5 grains to 47.3 grains
Remington 9-1/2 Primer


100 grain:
RL-22 From 25.0 grains to 45.5 grains
Remington 9-1/2 Primer

You might want to try:
IMR-4831 From 35.0 grains to 46.0 grains
Remington 9-1/2 Primer

thanks gents,
what powder would be most suited to a 20" barrel guys?
thanks in advance guys
swath

Do you have a suppressor on that 20" bbl? If so what does the mfg say about slow burning powders? Just asking.

As to the powder I use 4350 in the 243 on bullets from 70 to 100 grs.

it hasnt got a mod on it,got one on my ticket though,just havent had it done yet!
why what do they say about slow burning powders?
swath

IMHO all the above powders are to slow for a 20" barrel I have used H-380 RL-15 WITH EXCELENT ACCURACY OUT OF MY MD-7 18" and no fires started here LOL.



'

You might also want to look at IMR 4064 if you can get it in wales ( made here in Canada) Lists as a bit faster than RL15 or H380. Varget might also be something you could look at too if you are able to get your paws on it. Of course you will have to follow the recomendations of the Mfg's on min & max loads primers and so on but you just might find a winner. I wish I still had a .243 but being a dummy I sold the rifle. I have had stellar results in a couple of different caliber's with IMR4064 and have found it to be super accurate in the rifles I burn it in.

Hope this helps.