I'm pretty well set on the 280ai now. I spoke with a gentleman at barnes today and then ran some numbers on the various. 284 cal LRX bullets. He highly recommended the 139LRX and it looks like it can be driven about 3150fps, so it keeps up pretty well with the others. He recommends the 168LRX for the bigger magnums, 28 nosler, stw and on up but definitely need an 8 twist or faster. Thanks all for the excellent feedback. Look for My next thread, where I'm soliciting advice on cerakote to go with my stock and barrel.