suggestions with a 204ruger loads ?

[204TIM]

hello to ya
I started at a min. load and worked up a max. load. the best group was 26.5grs of h322 in front of remington 7 1/2 primer with 32gr hornady,worked the seated length from below to almost falling out of the case. Best groups are from 2.600 to2.305. Powders that have been tried h322,varget,BL-C(2),IMR4895, and primers that have been tested winchester,federal 205,GM100M, remington 7 1/2. Here's the deal for months going through app.1200(with this load all together about 2500) rounds best groups are just under 3/4 of a inch at 130 yds with temperatures above 45 F. The other day temperatures where down to low to mid 30's groups where 3/8 to 1/2 of a inch. Yesterday temp. was 50's and groups opened up to the normal 3/4 of a inch. I gave the barrel 20 to 30 minutes between shots to cool. So any suggestions??

thanks tim