I like my original answer for my friend "Builder". However, for the information of everyone involved in this thread, RST makes an excellent low pressure 5/8 ounce load in 2 1/2" cases which would be suitable for older guns of light weight, even composite barrel guns in good condition. I shoot the RST 5/8 ounce loads in short chambered Parkers. I use the 1/2 ounce reloads in the 4 3/4 pound Francotte. rstshells.com for the RST price list.