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Qtiphky · October 25, 2011, 02:26 PM

In my recent trip to the range, I discovered another anomaly that I am confused by. As I was sighting in my 300 WSM and my 308 Win, I noticed the velocities didn't seem right. The 308 had higher velocities than the 300 WSM with less powder. The 308 was shooting a 15 grain lighter bullet, but it also had 7 grains less of the same powder. Here are the results:

300 WSM
165 grain Nosler Ballistic Tip
52 grains of H4895
2780 fps

308 Win
150 grain Barnes Tipped TSX
45 grains of H4895
2822 fps

Does this seem right?

October 25, 2011, 02:26 PM	#1
Qtiphky Senior Member Join Date: December 11, 2008 Location: Upper Michigan, above the Mackinac Bridge Posts: 568	How is this possible? In my recent trip to the range, I discovered another anomaly that I am confused by. As I was sighting in my 300 WSM and my 308 Win, I noticed the velocities didn't seem right. The 308 had higher velocities than the 300 WSM with less powder. The 308 was shooting a 15 grain lighter bullet, but it also had 7 grains less of the same powder. Here are the results: 300 WSM 165 grain Nosler Ballistic Tip 52 grains of H4895 2780 fps 308 Win 150 grain Barnes Tipped TSX 45 grains of H4895 2822 fps Does this seem right?