Back again. The loads I use are as follows. All bullets are sized .509, CCI 200 large rifle primers, Bell brass.
340 gr round nose from an NEI mould, 66 gr IMR 3031.
400 gr round nose NEI mould, 62 gr IMR 3031.
All are loaded with a dime sized piece of toilet paper over the powder and a tuft of dacron about the size of a golf ball, uncompressed, over that followed by the bullet. These loads group about 4 inches at 100 yds in my rifle. Drop back about 4gr on the powder and work up. Your first loads should shoot high and wide, left and right for the respective barrel and as you increase powder/velocity they should come to the center and lower until they converge. Do not use heavier bullets, the 570 gr bullet is designed for the nitro express load and would be unsafe in a BPE. You need to be sure your rifle was set up for the BPE loadings or Nitro express. If not stamped on the flats under the barrels assume BPE. Generally the BPE rifles will have a low front sight where a NE will have a higher front sight but this is only a clue, not definative. The NE will also weigh about 10 - 11 pounds due to the heavier barrels and probably have shorter barrels, 24 inches or so, where the BPE barrels may be as long as 27 -28 inches and the rifle weigh a pound or two less. As long as the rifle is in good shape the BPE load should do OK. Just remember you can't go to Walmart for new barrels, do your research.
