I've done a search but didn't come up with anything - if I've missed it I apologize.
My question is on determining what size to use / designing / making the rifle for.
I've always used 5/16" as an example for a .36
Obviously, on rifles such as Vincents, smaller rods were used for larger calibers - i.e. 5/16 for calibers above .36, etc.
Obviously, a 3/8 will work on a .40 but is it the best choice? I have had rifles with a tight ball/patch that weren't the easiest to ram home. At the range, I usually carry a range rod but historically, how was the size determined? Did they go on the largest that would fit or keep the diameter smaller for making the appearance more pleasing? I'm and experienced shooter (50 years) and realize it is all in how and where you grasp when ramming to make a smaller rod work. I'm just curious if there was a "rule of thumb" that was followed or was it just up to the builder?
I always use straight grained hickory to make the rods. I'm thinking that out in the woods or on a trek, a larger diameter may perhaps have been a safer choice in regards to breaking and being stuck without a ram rod. But then I'm wondering how much the aesthetics of the rifle played in this decision - as an example, a 5/16 for a .40 because it looked better instead of upping the size to 3/8.
Your thoughts please . . . . many thanks.