You have a good, accurate rifle with loose screws.

there was a similar post like this called wandering zero for 30.06 or something like that. i had commented on it that i have an older savage06 and the same thing had happened to me, i think the barrels heat up quick within 2 shots and throw it off.

First off, stop shooting that TBBC ammo to sight you gun in. Your wasting about $35 a box. Go get some blue box federal or green box Remington. Check your scope bases and rings to make sure all is tight, then check theaction screws for tightness. Once you have all that done, then you can try sighting the scope in. If still getting the same results then have a known good shot put several rounds through it. If still bad buy a quality scope.

Ok, this will repeat good advice already posted, and add some basic stuff which I apologize if you already know it.

Check all mounting screws and torque and lock-tite per specs. If this is unfamiliar to you, or if you feel uncomfortable with it, take it to a reputable gun shop or gun smith. IF (big if) they charge you for it, it will be negligable. Chances are, if you buy a couple boxes of shells or other gear, they'll just do it. Regardless, you need to make absolutely sure the scope is mounted properly so you can not only zero it, but also to make sure that it's not defective.

Buy some decent, readily available factory ammo. Winchester, Remington, Federal, etc. Something that you could virtually buy anywhere, any time. Don't go premium at this point. Later, you can fine tune the ammo you use, but for now, you can get groups good enough to zero the gun with anything.

Set yourself up at the range with a good sighting system. Buy or make some sandbags at the very minimum. Buy a sighting stand if you can afford it. It is critical that gun movement is eliminated as a factor.

If you suspect flinching at all - put a temporary pad on the butt of the gun. I use a slip on crude pad I made from foam pipe insulation. As an alternative, wear your warm hunting jacket(s). Do some dry firing to get used to squeezing the trigger w/o flinching. You need to make absolutely sure that you're not flinching.

Then go through the process of getting groups at 25 yds, 50 yds, etc. The groups will naturally spread out with distance.

If all of this falls into place and you're getting consistent groups at (whatever range you choose), then zero the gun with that ammo.

Then, you can experiment with various brands and types of ammo depending on your source of game and figure out which one is most accurate (smallest groups) with your gun. Don't worry about where on the target it hits, just look for group size. When you find the consistently smallest group size, then zero for that particular ammo. My personal philosophy (not a re-loader) is to try to figure out which COMMONLY AVAILABLE ammo is best, or acceptably accurate, in my gun. That way I can just buy a box of it wherever I am.

Good luck.

If all else fails. Remove the screws holding the simmons scope in place. Grasp the scope by the bell end. Slowly raise the scope over your head and behind your back. Now in one fluid motion throw that POS as far as you can onto a concrete driveway. Now retrieve said POS scope and throw the pieces in the trash. Head to your local retailer and check out Nikon, Leupold, Bushnell.... Buy a decent piece of glass. Nikon gives the most bang for the buck on the low end prices.

That simons scope is a weak point. At some point its going south. Most times its when athirty pointer is in the cross hairs. I wouldn't put a simmons scope on my no good brother in law from Illinios' rifle.[8D]

Well said, Shato............

Yer poor brother in law

The last Simmons I shot din't hold up well at all....

Thecenter mass hit via TSX kinda broke it a little........................

I agree with BEARFAN.

I am not sure what type of bench rest your using but I just read something the other day about having the actual baerrel in contact with what you are using for a rest. It said that if your barrel is resting on whatever your using for a rest instead of just the forend that it will throw flyers all over the place. Something about it messing up the harmonic vibrations or something to that effect. By what this stated make sure that the barrel is not resting directly on whatever your shooting it off of. Like most have already stated though usually it is something that is loose.