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Old 07-21-2014, 02:25 AM
rojodiablo rojodiablo is offline
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Quote:
Originally Posted by Ltorote View Post
The following are my chrono'd velocities out of my M&P 10:

Factory:

Winchester X-S 150 gr 2671fps (vs. 2820 fps on box)
PRVI 145 gr FMJ 2684fps (vs. 2838)
Twin Cities M80 Ball 147gr 2717fps (vs 2790)

Handloads:
165 gr Hornady SST w/43.5gr RL-15, 2600fps
165 gr Sierra GK SPBT w/43.6gr RL-15, 2555fps
These mirror my chrono'd speeds seen from various ammo types (Federal, Winchester, NATO, Wolf/WPA) It's the barrel length itself, not so much rifle specific. A 16" barrel gives up about 2700FPS. in ideal conditions.
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