I’m assuming that your uncle hand loaded these bullets for his rifle, and not the rifle you currently hunt with? If this is true, then I would not shoot them. Just because a hand load is safe in one rifle, doesn’t mean it’s safe to shoot in another rifle.
Varget should get you there in terms of velocity. I really like the 185TTSX bullets, I have yet to be disappointed with there performance on game. Those 186 Shock Hammers look interesting. Have you considered the 175 Hammer Hunters, should be able to reach over 3k fps with those. Be interesting...