That's about 45moa up and 45moa down. If you're still hitting low at 50 yards with the scope cranked up as far as it will go, you probably have a problem with the scope base. Henry offers their own base for their Big Boy rifles. There is nothing wrong with Weaver bases in general, but in this case there may be a problem with the one you're using. Are you using Weaver pn 63B (48069)? That's the correct part number for the Henry 30-30 and 45-70. There may be a different base for Henry's in other calibers that might fit but not be correct for your gun. If you are using the correct Weaver part number, I'd suggest sitting it aside and getting the Henry branded base that is correct for your gun just to eliminate the possibility of having the wrong part. Another option is to use the base and just get some Burris Signature Zee rings with the inserts to correct issues like this. Like I said, if your scope is tracking repeatably, it's probably not a scope issue. For general information, what load are you using in this gun? Factory or hand load? If hand load, what bullet and powder/powder weight? That could potentially have something to do with your POI issue.358 clicks from top out to bottom out.
Not really. He could be using up all his adjustment simply because of some of the reasons that Scortch pointed out. If he's got the scope mounted incorrectly for some reason, he could be well past the point where the scope has enough adjustment to get the POI correct.After reading my post I can see why NoSecondBest thought the math is wrong. I was being very general. I was just quoting that the scopes states that it has 50 MOA so that is 25 Moa up and 25 down. And you are correct that it would take 100 clicks at 1/4 click to move up 25 Moa at 100. Each click at 50 yards than have a 1/8 inch value. So for him to be topping off at 50 yds tells me there is something wrong with the scope. It seems that the scope at 358 clicks is giving less than 20 total Moa elevation.
I had a Browning Low Wall that I had to shim. Nothing else worked. The front and rear bases just weren't on the same plane. A very thin shim fixed the problem perfectly and it was one of the most accurate guns I've ever owned. That's one option, and another could be your load needs tweaked. The 45-70 (I own several) can really shift the POI depending on the load being used. What bullet and powder/charge are you shooting?I have on more then one occasion shimmed the mount base and gotten out of trouble.