I have an H&R 3.5 12 guage turkey gun with interchangeable choke tubes. I'm getting back into turkey hunting after a long 20 year break. I'd like to get this kickin mule set up for some great patterns using longbeard xr in 3". Has anyone else had any experience with some good tube/shell combinations for this particular gun? I'd really like to install some type of red dot or scope also but I'm not really sure what my options would be as far as having it drilled and tapped.