Is there an acceptable adjustable mount or rings that will correct this condition?
here is an inexpensive scope mount that is adjustable for windage and elevation. Its a one piece mount so it shouldn't put any stress on the scope tube. It does not come with a stop pin though. I found that it would slip on my rail, so I fashioned a stop pin out of nail of suitable diameter. So far it seems to be working well and allows me to keep the scope close to optical center. <https://www.amazon.com/ohhunt-Dovetail-Profile-Elevation-Adjustable/dp/B079HSV7M6/ref=sr_1_32?dchild=1&keywords=ohhunt+scope+mount&qid=1582128857&sr=8-32> It appears to be a copy of the Sportsmatch AOP55 mount which would be preferred as it comes with a stop pin. <http://www.airguns.net/reviews_sportsmatch_adj_mnt.php>Sorry for putting the links in brackets, but I was getting some strange warning about links and I'm not sure how to post them correctly like Ed did above.
Whatever it has, it shoots about 8-9" low at 25 yds.. Not enough erector travel on the Hawke 4-12 Airmax.
I've used the RWS lock-down in both 1" and 30mm models successfully. Recently I have gone to the Diana Bullseye ZR base that also gives scope protection because it recoils and absorbs 90+% of recoil energy before it gets to the scope. The current version comes with inserts to allow both 1" and 30mm scopes. As noted, you have to have a scope that will fit the RWS base or the XR base. They are long buggers. To be safe, I would use a scope that is at least 5" between the Objective and Eye Piece bells. The droop correction stated by NCED (0.025"} is for the distance between the back of the back ring to the front of the front ring - if that makes sense. The correction as a ratio is approximately 0.004 inch per inch.The thing that has always puzzled me is why the barrels are not assembled to the action to zero at about 35yds in the first place. Perhaps they may be for iron sights but not for scopes. This leads to the observation that the so-called droop in the barrels is mostly caused by the large scopes set high and the very short ranges at which we have to zero air rifles. Which takes me down another rabbit hole, if it so easy to bend the barrels do break barrel barrels get bend down in the process of cocking the more powerful ones??NCED is always a good source of information and explanations!!! By the way, I have seen the barrel straightening picture he shows in a factory setting. The one I saw as in a Savage plant. Virtually all commercial barrels for powder guns have to be tweeked to straighten them in the manufacturing process. One of those things like making sausage - the result is good but the process is messy!!
OFTEN, such excessive droops in 34's come from an aftermarket breech seal, or a shimmed breech seal.If it's a new gun, return it and get it exchanged, 8-9" at 25 is far beyond factory specs.If it is not a new gun: Make sure that no one tampered with the breech seal in your gun and/or go back to the OEM ORing spec.Now, coming back to "normal" guns: ALL airguns using scopes of larger than 30 mm's objective lenses and/or high mounts, wanting to shoot at 10-> 35 yards WILL NEED "compensation" even PCP's. IF THEY DON'T, then the manufacturer (such as Walther) has provided an upwards looking barrel to solve that.Compensation can be done either through the mount, or by "regulating" the barrel to the scope and mount combination.It is simple geometry, and unless you think that parallel lines can converge in short distances, it is not difficult to understand.Keep us postedHM