In the "Cabalas 2002 Shooting Catalog" (pg. 32) you can find Weatherby Ammo by Weatherby:

87 gr. SP $32.99
100 gr. SP $32.99
115 gr. BST $36.99
115 gr. XS $46.99
117 gr. RN $32.99
120 gr. NP $46.99

You can also use Federal Nosler Partition 115 gr., and Federal Trophy Bonded 115 gr. I don't know their prices.

For sheep the 115 gr. Nosler Ballistic Tip (BST) will do the job, so will SP, XS, NP, or TB 100gr. +. It just depends what shoots best in your rifle.

The Mark V 257 Wby. Mag. Ultra Light Weight you are talking about only weights 6.75 lbs. it's a very good choice for sheep hunting. The Super Big GameMaster (SBGM) seems to be the same rifle except for Stock Finish and the barrel may not be stainless steel. Good luck.

Edited by - handloader1 on 12/07/2002 23:56:57