The following loads must be worked up to....your rifle may not respond the same. Have fired the norma 257 Weatherby brass four times with no primer pocket looseness or other signs of excessive pressure.
Barrel has over 800 rounds through it. It is now so worn that 115 VLDs are occasionally being damaged.
Switched to the 110 moly coated accubond which has no issues with integrity:
257 Weatherby: 28" #5 fluted SS Lilja 3 groove barrel, moly coated 110 accubond, .015" off rifling. (custom shorter throated chamber reamer)
75.5 gr of RL-25 vel 3615 fps
Then RL-33 came out:
moly 110 accubond:
unknown territory, started low with 76 gr for vel of 3318
jumped to 80 gr 3432 fps
81 gr 3525
82 gr 3559
83 3625 slightly faster than old load with RL-25
83.5 3674 fps shot well two shots were same velocity
84 gr 3704 fps shot well two shots were same velocity
84.5 gr 3735 this is max case capacity with 6" drop tube
Have shot the 84.5 gr load multiple times including temps in the low 90s with no pressure signs. Excellent accuracy tested out to 500M.
