Do you hand load? If you do, you should be looking at the Keith 173 grain bullet. 14.0 to 14.5 grains of 2400 is my personal top end load, but some people go a little bit higher. Of course you want to start lower and work your way up.
A lot of people will say "it's just a heavy SWC" and to a point that is correct. But it is arguably the best SWC ever made. A typical 158 grain SWC has a center of gravity in the base of the bullet, but in the Keith it is up in the nose, weight forward. This gives you consistant, long range accuracy like no 158 grain I ever shot will give you.
If you ever try some of these bullets, you will be pleasantly surprised by them.

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Geoff. Since 1960.