Suppressors suppressor and change of impact as barrel heats up

[SGT907]

I have a YHM Phantom SS QD on a 25" Kreiger 1/10 .308 standard varmint profile. Obviously there is a POI change between suppressor on/off... about 1 Mil high when off. Question is..... Is it common that as the barrel heats up due to shooting that you need to add more elevation into your scope to hit targets you were hitting previously with less elevation dialed in? My friend and I have similar set=ups and we seem to both be experiencing this....

 

[Tevis]

I believe that is mainly due to the weight of the suppressor. As the barrel heats up the can will "move" the barrel a tad bit. I have a 26" sendero contour from GAP with a 14oz Ti arbiter that I haven't been able to tell much difference in though once the barrel gets good and warm.