I contacted JD Jones by email and he responded quickly as usual to my questions about a starting load for the the 175 grain Lehigh bullet in my 375 JDJ. They came in the mail today. I loaded them up with 40 grains of IMR 4198. The next chance I get I will be testing them at the range.

I bought a Caldwell chronograph to help with the testing. It is a little harder to get the chronograph to read than I expected. It is very sensitive to light and being level. I still have not been able to get a reading with 204 ruger.