Been shooting cast boolits in 92fs for years, no problems. Powder coat is good also. Like above, shoot a few rounds of copper after shooting cast plus normal cleaning.
That's the same recipe I use, but a different loader. I always double check the powder drop. I also carry a wood dowel that others suggest, but have never had a squib. Just take your time!
Congratulations! That is a great accomplishment. I wish I did it when I was young and in the scouts and did not have a job. I have been section hiking Maryland and Pennsylvania which has been tough to do part time and working full time.
He will remember it for a lifetime, way to go!