Model 70 Winchester XTR. .270 Win. 3/20 empty cases showed deep primer impressions. The rifle had not been shot in 6 or 7 years. I do not know if the deep primer strikes were the first rounds fired or not, but they did occur in the first 10. Ammunition were hand loads. I am guessing that this is probably not much to worry about if this no longer occurs. Any suggestions as to the possible cause would be helpful. Thanks.
