329PD ping
When I purchased my 329PD my first call was to a SW Tech rep named Whitehouse . He told me to stay below a 240gr commercial load pressure. I have since learned that garrets defenders are big and slooooooow......yet heavy 310gr hardcasts drive deep in the critter.
Hammerheads in my 45-70 and defenders in my 329PD.
Garrett of TEXAS !!!.....:o)