I used to carry a 12 gauge 870 Express with a 18.5" rifle sight barrel, extended mag tube, shoulder sling that I put 7 rounds on for storage when transporting in vehicle or when the gun was unloaded (these are the rounds that I loaded the gun with, I didn't shoot with them on the sling). I also keep an extra 4 rounds on my Cadwell Ridge butt stock holder.
Due to not being able to find slugs that I personally felt where fast/hard/heavy enough, I have now switched to carrying a Marlin 1895GS 45-70 which I load with my own reloads of 550gr Crater hard cast bullets @ 1600fps when in big bear country and 420gr Crater hard casts, 400gr Speer JFP's and Rem 405gr JFP's @ 1950fps when I'm only dealing with black's.
I find the 45-70 lever gun easier/lighter/handier to pack than my shotgun as well.
Due to not being able to find slugs that I personally felt where fast/hard/heavy enough, I have now switched to carrying a Marlin 1895GS 45-70 which I load with my own reloads of 550gr Crater hard cast bullets @ 1600fps when in big bear country and 420gr Crater hard casts, 400gr Speer JFP's and Rem 405gr JFP's @ 1950fps when I'm only dealing with black's.
I find the 45-70 lever gun easier/lighter/handier to pack than my shotgun as well.