I crimp in a seperate operation . I use a redding profile crimp die , i have tried others but find the redding the best for stright walled cart. What it does is keep the mouth of the brass paraell to the bullet and swages it into the crimp ring on the bullet. You can set it so you lock the bullet in place by nosing the face of the brass up to the front of the crimp ring and the bullet won't move during recoil. The crimp - seating die rolls the crimp in .
They run about 22 dollars .
If you seat and crimp in one operation the crimp starts as the bullet is moving , not a good way to achieve tight groups IMHO. If a 2 inch group at 100 yards is your goal you may wish to try it , its about the cost of a pound of powder.
Another trick is to use a more powerful rifle scope while testing to get a better sight picture , just don't crowd it
![Grin ;D](https://www.gboreloaded.com/forums/Smileys/default/grin.gif)
. Your goal is do able with some fine tuning.
I once saw a guy shoot the turkey head of a IMHSA target 10 times with open sights . That was at 150 meters maybe a 2.5 inch target. He may have been shooting a 357 super mag not sure.
It would be nice to hear how it goes .