also when was the last time ( before you shot it and hurt your shoulder ) were at the range shooting that gun?

i know for some reason that after acouple of months of me not shooting ( for instince when i bought my new 450marlin ) i did not shoot my guns for quite some time. when i finnaly did .. oui did they all hurt ! even my 30-06sprg using 165gr's. and i could only shoot that 450marlin 20 times.
but after shooting them for some time i can shoot them all day.


maybe that could be your problem?