I own two 7mmstw's and a 7mmultramag and have owned two 7mmremmags.If you don't handload forget the stw and ultramag as factory loads are pathetically mild,are expensive and are avaliable in few loadings.The 7mmstw and 7mm ultramag provide little advantage until well over 300 yards so again they offer few advantages for the average shooter.The next thing to consider is how much time and money are you planning on spending on practising and do you have a 400 yard or 500 yard range nearby?If you have access to a 400 yard or 500 yard range and are prepaired to shoot several hundred rounds at various ranges to develop and maintain the shooting skills necessary to consistantly place your bullets at 400 yards the stw and ultramag may be a good choice.If however you aren't willing to make this commitment you will not be able to take advantage of the superflat tradjectories that the stw and ultramag offer and will be better off with the 7mmremmag.I actually prefer the 7mmstw over the 7mmultramag as the ultramag only offers an extra 50fps to 75fps over the stw but burns a great deal more powder at the expense of even shorter barrel life to accomplish this.