In my Sidekick I tried 240gr. Speers and 90grs. T7, did'nt group to well at a 100 yrds. I now use 300gr. SST's, 90grs. T7, and have got some 1in. groups at a 100 yrds. also use Harvester sabots for easy loading and Win. T7 209 primers. I was using regular Win. 209 primers and was geting crud ring. I was going to get the 25 acp conversion but tried the Win. T7 primers first- no crud ring no misfirers with loose powder.