Several years back Musgrave was having trouble making barrels. they were using the button process. they contacted my friend and barrelmaker CP Donnelly. He went to South Africa and guided them through the process, after which they had no further problems. On his return he received an action from Musgrave. He barreled it to 22/4000 and sent it to his brother as a give, however it was stolen in transit. But to your question, I'm not familiar with the various models, but CP was very impressed with the bolt action, which may be the same model that you have. An CP's opinion was well established. Sounds like you got quite a good deal.