I think it will be fine. I used 165 gr Speer Grand Slams in my .308 quite successfully, but generally one can drop one bullet weight when using the monolithic TTSX and similar bullets. I do use the 168 gr TTSX in .30-06 and .300 Weatherby and 150 gr TTSX in 7mm Weatherby.
Life Member NRA, RMEF, American Legion, MAGA. Not necessarily in that order.
| 
