Your loading rod is the perfect length now. If you go to all that trouble to make the hole deeper, you'll gain no more than 5/16" at most. For what??? then it's make another ramrod. Your rod should be flush with the muzzle when in the gun - not protruding where it will interfere with loading, and a danger to it and the rifle when in the bush. Waste of time, for no gain.
I see. Not sure if you saw this picture I posted, but as you can see the rod is flush with the muzzle when all the way down:
This looks normal? I’ve had two others rifles, a Lyman’s Plains rifle and a TVM Tennessee. Both had the ramrod sticking up about an inch when inserted into the barrel. As I plan to recreated a historical ramrod with tapered tip and thread on tow worm/ball puller, which cannot be used as a loading aid for obvious reasons, my plan was to make the rod about an inch taller than the muzzle. I did this for the one I made for my Lyman GPR and it didn’t cause any issues.
It’s just that with the current rod that came with the gun, even with a loaded barrel (I plan to use lighter charges for small game) the rod wouldn’t be sticking out but an inch or so and that’s all I’d have to push down on when seating the ball...
I’ve decided against drilling the hole any deeper, but for the reasons stated above, will probably make the rammer just a bit longer because:
A) I will NOT be using a modern screw on jag
B) It will be too short for seating the ball
C) It is historically correct for some guns
I will have range rods and modern jags and stuff for the range and when cleaning at home, but for HUNTING in the woods I want to go as period as possible for the rifle and gear. It’s just a personal goal. If they did it back then, so can I, and I
want to do it.