[Southpaw]

All sound advice. Yes gun was checked years ago and it is considered a safe shooter. Was told shoot with confidence and just take care of it. Can't find measurements but just recall barrel thicknesses at chamber, mid barrel and at muzzle checked out. Probably no more than a flat of shells has been fired through the gun in 20 years since I have owned it. But metal isnt getting any younger. I know that Vulcan fluid steel is tough stuff but those barrels just look thin compared to modern guns. But every Parker I look at has thin looking barrels. Have an acquaintance that has a Phd in metallurgy will ask his opinion on aging fluid steel. Heck gun is celebrating its 110th year in service.

What has me confused about these RST loads that are supposedly low pressure is that they have load offerings with velocity ranges of 1100 to 1200 fps in 1 ounce loads. Almost all shot shells they offer are for 2.5 chambered guns. My gun is factory stamped original at 2 3/4 chamber and was not modified. I did find on the loads that I have that they are 2.5 dram with 1165 fps velocity, which is less than some RST. Heck a 1 ounce load is a 1 ounce load, so what makes these RST's considered safer or lower pressure loads than the ones I have. Is it the powder or charge. I know some powders have different burn rates like a blue dot compared to a red dot powder.

My thought is to go to RST for the spreader loads anyway but, just wondering. Best I can tell is that they are suitable for guns to handle a 2.5 chambered barrel unless someone knows different. Maybe this has been discussed in other threads but I did a search and did not find anything.