I would really appreciate any advice with a problem I have experienced,
I am new to reloading and have just prepped my first batch of once fired (in my own rifle cases), the bullet head seating seems very loose on all the cases prepped, I have checked it and they seem to be all formed at 0.280".
I have checked my new Lee die set it is 0.275" I have referenced this against another die set and it appears to be correct for calibre, in addition, a case formed in a friends .270 seems to resize correctly in my neck dies.
I can only assume that the brass has been "fire formed" to this diameter. Or it is something I have done in the cleaning and reaming?? The rifle is a 4 year old Sako 75 and has given excellent service.
Can anyone shed any light on the problem?