If you prefer to shoot heaver bullets then you should look at calibers that have what you want in the middle of their loadings such as a 30 caliber. I never have been a fan of the short magnums but they will get the job done. What you need to look at is the velosity of the round and the balistics that it creates. A 165 grain bullet out of a 7 WSM at 2900fps is just as effecitve as the same bullet out of a 7mm Remington mag or 7mm STW at the same velosity.
But your problem would be that the 175 grain bullets are going to be at the top of the bullet weights for the 7mm caliber and some rifles may not shoot them accuratuly. So then if you go up to a 30 caliber the 175 grain bullets are going to be just above the mid weight of the bullet selection and they may preform better. But if you like the 7mm caliber then there is no deer or elk that is going to notice that you shot them with a 160 or 165 grain round. In my opinion the 160-165 gain bullets are where the 7mm's shine.