I find that 150 gr. loads are not necessary to shoot, and are a waste of powder. The reason you may not be able to find a post on 150 grain loads are that there is probably not many, as a little less charge is just as effective and usually will group better. I have shot Hornady XTP 44/240 or 45/250 using 150 grains, but it shot a 5-6"group at 100 yds. I backed the charge down to 100 grains and then it grouped in the 2-3" range, shot off hand without rest. As mentioned above it would be good to know what ml. you have, as most are now 'rated' for 150 grains. You may want to check out the excellent post on 'magnum bp loads' on this forum, as some guns with this magnum capability are not rated for it.Anyways it is just my .02.
NEW222