Daystate Airwolf owners

Skip,

Some Sightron scopes are more susceptible to temp shifts than others.

6 clicks, speculated at a 30 zero, is not that much 

Simple test to determine if it's the gun or scope.

Next time, zero and sight in as normal at 70 degrees. Shield just the scope. Wrap it in thin rags, wrap it in tin foil and rags, leave the rest of the gun alone.

Wait till its 80 again.

If something shifts zero, it's most likely not the scope. Sightron scopes are usually for the most part, stable.

I see that is an Airwolf. Does it have a shroud? That has some bearing on temperature shifts as well.

Tom Holland 

Hi Skip,

All the FT pcp rifle/cope combinations are affected to some extent. Part of setting a rig up is testing at the whole temperature range you will encounter in competition. 6 clicks can be a lot depending on which turret gradient is used. My 1050 is MRAD and shooting at 17 fpe with a 30 yd zero only requires 15 clicks for 55 yds. I chose MRAD so a click is a discernable movement of POI. The 1050 with MOA clicks are much finer and 6 may not be much. How much in inches or compared to the KZ might be a more applicable measure. I had a new Ataman that had copious grease inside the reg and it dropped 200 fps going from 60*F to 35*F. On the rifles I build my preference is a beefy stiff one-piece riser rail to bridge the receiver loading gap and Burris Zee rings with the plastic inserts. I have not worked on an Airwolf. I have 2 Steyr LG110s and they react differently to temperature change. Tom's advice above is good. A chrony may reveal some data on what is happening too. There is something to be said for the man who only has one gun as after a couple of seasons he knows exactly how his gun is going to react.

Will

I doubt it has anything to do with the scope solely...but the way the scope is fastened in relation to the barrel could be part of the trouble.

Is the velocity changing in this 10 degree temp variation?

Are you talking about an elevation change or a windage change?

The last generation of Thomas rifles would vary about 2fps per 10 degrees of temp change. The newest vary zero over 60 degrees. They also exhibit no mechanical shift.

Mike

The last generation of Thomas rifles would vary about 2fps per 10 degrees of temp change. The newest vary zero over 60 degrees. They also exhibit no mechanical shift.

Mike

Click to expand...

Mmmm I'm all excited

Mike, sounds like you have it figured out! Way cool. You are going to take away half the skills needed in FT.

2fps shift per 10* is about the best I can usually get. Now I know I have more work to do.

Call me when you have zero wind drift built into Thomas rifles lol. Wish I had more time for R&D. I don't see how you do it all.

Ha ha, Will....that zero drift may be a ways off.

Ill see you next week at Cajuns.

Hopefully we will stay dry!

Mike