Gents,

I am getting right at 1" groups in my M70 Super Grade (26" barrel) using 74gr of IMR 7828SSC behind the 180gr TTSX. This is seating the bullet to 3.34" (SAAMI length) per the Barnes manual. That's certainly good enought to hunt, but many do better than that from what I've read. I know in other loads for other calibers that Barnes recommends sometimes seating deeper resulting in a shorter than SAAMI recommendation.

For those of you who shoot this bullet in .300WM, has changing the seating depth improved the accuracy? If so, did you go deeper (shorter COAL)?

I'm not sure if Barnes still includes with their TTSX bullets instruction on seating depth. The TSX they said seating depth would be best between .030" to .070" off the lands and start @.050".

I would call Barnes see if it's the same with the TTSX bullets.

Your getting 1 inch groups why worry unless your target shooting or trying to take game past 500 yards.

From what I read some people shoot under half in groups with some rifles

Some people spend hrs days and years trying to get another eight of an inch off their groups.

I just don't find it worth the time.

Play with them if you want have at it but your rifle is shooting just fine.

Seating deeper has worked out well for me. Basically I've stumbled into that by magazine box limits and wanting to seat to a driving band (vs. some arbitrarily chosen OAL). So, yes, Barnes X/TSX/TTSX can benefit from seating "shorter".

I've been using Barnes since 1992, and load them in everything from my 22Hornet to a 300Weatherby.

In most rifles, I've gotten excellent accuracy seating them to 'book' COL. When I'm looking to improve accuracy with Barnes, I seat deeper.