Posted By jboshoven on 08 Mar 2013 08:43 AM
In my experience, the difference from one barrel to another is greater than the difference between a 130 gr Speer Spt, 130 gr Sierra SBT and a 130 gr Nosler partition bullet. When working up a load for a new bullet I usually look for a manual that lists the grain bullet I plan to load and the powder I want to use. Then I start somewhere in the middle of the range or if I already have a load worked up for the given powder and another bullet of the same weight I drop back to 90% of the powder charge and start from there (assuming I do not go below the minimum charge listed in the manual). I then work my way up in 0.5 or 1 grain increments looking for impact on accuracy until I find the best group without exceeding the manual limit for powder charge or stop increasing at the slightest sign of excess pressure (whichever comes first). The only exception to this rule is the difference between solids and “copper” clad lead bullets. Load data for between these types of bullets of the same weight is not interchangeable. In general, solids result in higher pressures because they are not a ductile as lead core bullets.
Therefore, my experience indicates that the manufacturer rep is correct.
THE FUNNY THING ABOUT MY HORNADY GMX BULLETS IS THAT , I CAN LOAD THEM WITH LEAD DATA.. AND HAVE NO PROBLEM'S WITH PRESSURE OF F.P.S. MY GMX 150GR FOR MY 30/06 SHOOT AT 2,987 F.P.S. AND MY PRESSURE IS AT 46,000 CUP .. BUT FOR BARNES BULLETS YOU BETTER WATCH YOUR LOADS VERY CLOSE AND DONT PUSH IT.. I ALSO LOAD MY BOLT ACTION 30/30 WITH THE NEW HORNADY NON LEAD BULLETS AND , I HAVE LOAD DATA FOR THEM THAT YOU CANT USE FOR LEVER GUN'S.. I HAVE LOADED SOME BARNES 110GR TTSX BULLETS FOR MY 30/30 BLT ACTION THAT KICK LIKE A 22 MAG BUT F.P.S. IS AT 2,885 AND THE PRESSURE IS AT 24,000 CUP.. SO , I THINK THATS A GREAT LOAD FOR ANY GAME .. I'VE TAKEN SHOT'S AT 350YRDS WITH THEM AND PUT THE COYOTES DOWN SO, I KNOW THEY WORK GREAT.. RETIRED USMC SNIPER , LM NAHC , LM DU , LM NRA , LM NATIONAL MATCH SHOOTERS ASSC ..