Re: Too much powder? Beginner needs some help!!
The diff's are probably more in the barrels they tested them in. HOdgdon might have actually tested in a barrel with freebore. There are alot of people having custom guns made up nowadays. Some people are having them made without freebore and this TOTALLY changes the volatility of weatherby cartridges. It would be my opinion that Barnes is showing low data trying to protect themselves from one of these types of guns or a situation ike that. It's very important that you not just trust one source of data for your reloads....especially in a bad boy like the 30-378. It is critical that you cross reference as much material as you can.
By the way sometimes powder manufacturers change their minds big time after publishing data. When Retumbo came out they said 84 grains was a max load under a 200 grainer in 300 win mag. A little while later they published data for the 200 accubond at 78 grains.....that is a BIG change of heart there!!