Originally Posted by newmexkid
Right now I'm only reloading for 2 rifles so I can keep pretty good records without much fuss. I keep all my cases in numbered plastic boxes and generally don't worry about trimming until that particular box is coming up on it's 5th reload. Then again I don't shoot max. loads so I think that has some bearing on how many reloads you can get in between each trimming, (I think).
I think that probably does have an effect too.
Also, the particular cartridge being shot/loaded has an effect. For example, my old 220 Swift required trimming about every 3rd firing with only 1 FL sizeing in there somewhere and shooting fairly mild loads.
It's replacement (a 6 Long Dasher) has 8 fireings on a case, 3 FL sizeings with pretty warm loads and no measurable lengthening of the case so far.
All other rifles I've owned have been somewhere in between these two.