ok. i'm new to reloading. my hornady book shows 55gr loads seated to a COL of 2.200 but in the specs in the beginning of .223 chapter, it shows maximum of 2.260. i've been using remington lead tip bullets and have been loading them to about 2.200 col. then i switched to remington FMJ and noticed that when i seat them at 2.200 that i can push the bullet right in the shell with my fingers. i played around and have noticed that in order for me to not be able to push the bullet in with my fingers, that i have to seat them to a COL of 2.260.
i notice that when i load them to COL of 2.260 and chamber the round in my AR that the bullet DOES engage the rifling. (i can see scratch marks on the bullet and it is somewhat difficult to extract the round with the charging handle.)
is it the shape of the bullet that is causing the FMJ to push in easier? (I'm using the same brass)
is it ok for the bullet to engage the rifling like that when chambered?
how do you determine the proper COL when your reloading book doesn't address that specific bullet?
thanks so much for your help in my dilemma.