Hope to add .357 mag soon, in a Ruger M77 carbine rifle. Three die set for crimping? Any improvement in accuracy?

Bullet loads from 125 grain and up. The barrel is 18.5". It may be a 100yrd to 150yrd rifle. Have a Redding t-7 press so set up will be quicker than my old single. I've never loaded for this caliber or any pistol loads, excepting the savage striker calibers.