My concern about the less than military or match grade is the primer on the cartridge. The bolt will dimple the primer on return and softer primers could be a safety problem. I found a store that sells Hornaday match grade for the M1, but it is pricey.
I have never known Garands to be prone to slam fires.
Now my MAS49/56 - that’s another story.
For the -06 Graf and Son’s shows PRVI AMMO 30-06 150gr SP 20/bx $16.99