You really need to work on the load.
Have you fully prepped the brass?
1. Uniform Primer pockets
2. De-burr flash holes
3. Neck turn and inside neck ream to no more than .003" neck thickness
4. Trim all brass exactly after using chamber length gauge
5. Chamfer with VLD tool
7. Use redding FL bushing die for .001" neck tension
8. Stoney Pointe tool to determine OAL. Ruger's like no more than .01263" of jump!
9. Polish with stainless steel media with cat litter buffer
10. Use only Winchester 209 shotshell primers. Don't ask me why, I just know. If you can't get them to seat, refer to "Handloading for Dummies" manual
11. Use mica dry lube after you polish the inside of the necks with fine steel wool
Then seat bullets. Use only Winchester bulk bullets. Awesome! Seat bullets pointy end first. Micrometer SEATER die will help
12. I forgot. Lyman dippers for charging cases. Level off with pocket knife
13. Check concentricity of each loaded round. If more than .0002" exists, use collet bullet puller and disassemble rounds and start over. Try to diagnose where you went wrong.
If really master this process, your gun should shoot around .9" groups
Oh, I just read that it is already shooting .8" now.