I own a Smith & Wesson model 1500 in 25-06. I handload so I have tried many different brands of bullet and powder. When I first bought the rifle I did try some factory ammo so I would have once fired brass. I bought 2 boxes of Federal Premium 115 gr. partitions. Out of my rifle (it has a 22" barrel) I got 2954 fps and 5/8" groups. That is good velocity and excellent 100 yard groups. I haven't shot any deer with the partition. Like you I load the 115 gr. B-Tip. I have used the partition on feral hogs. One in particular weighed a little over 300 lbs. One shot at 135 yards and the hog dropped. I shot it broadside in the shoulder the bullet entered and exited the offside shoulder. I would say the partition is the best all around bullet for the 25-06. It is surely plenty for deer. If you would be hunting something larger like elk, I would go with a larger caliber. If you' re determined to use the 25-06 take broadside lung shots and use a controlled expansion bullet like the partition, Barnes X, Swift A-Frame, etc.