Had a customer contact me regarding the accuracy of the bullets he made in his BTSimple dies. Customer didn't provide any load data info but his inquire did lead me to the load development I did when I was testing the BTSimple dies and bullets these dies make.
In my testing I found that a difference of just a grain of powder or less can make a big difference on the potential accuracy of bullets made from 22lr brass.
Test gun and load info....
223 Rem, Savage action, CBI 26" 12 twist barrel, FC factory primed brass, Tac powder, 55 grain BTSimple bullets made from 22lr brass, 110 yrds, 50 degrees, light winds, 1500' elevation, shot off portable shooting table.
Notice how 25.0 grains of Tac powder shot better than 24.5 or 25.5 grains did and imagine if I would have settled on the poor 24.0 grain load with no development.
This was testing with just one make of powder and the 55 grain BTSimple bullets made from 22lr brass.
I have always been surprised and impressed with the accuracy I was able to obtain with bullets made from scrap brass, but I have also found they may be picky about which loads they prefer.
Here is a group from same gun, same day and same bullets using 24.0 grains of H335
If you're not getting accuracy as good as what you can get from typical factory bullets from your bullets made from 22lr brass a little load development may be all you need, you could be less then 1 grain away from some of impressive accuracy.
Good shooting and swage on!
Brian