M-10 (.280) or MkIII (.303) ?? (this is the accepted/adopted designations for the 1910 Rosses these days)
Judging by 150 rds I am going to guess the latter.
NOT safe to shoot, and you will be "flinching like a cigar store Indian" (as my Dad used to say) from this day forward if you do.
I suggest you find a new receiver from a donor rifle (usually last good part standing) and carry on. The receivers are and were interchangeable (that's why you see "M-10" on military .303s and "Model 1910" on M-10 .280s). Save for grinding a wider feed ramp on the .280s, no big deal. Also neither were numbered so you are clean and green.
Don't despair, you can be back in business with very little expense.
Good luck
Oldguncrank