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30-378 velocity

 
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Old 03-05-2008, 11:51 AM
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30-378 velocity

What velocities are you guys getting out of your 30-378s? I loaded up a buddies with 107grains of retumbo, berger moly 185vld, 10 thou off the lands and got 3680fps with a sd of 7fps. Gun has a 27 1/2in, 12twist schneider. This load shot great! No signs of pressure. Ohler chrony. Does this sound right? Seems really fast.
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Old 03-05-2008, 07:47 PM
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Location: Pelham, AL
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That seems extremely fast. Hodgdon load data for 180gr SPR SPBT with 113C gr Retumbo shows 3460fps. For 190gr HDY SPBT with 111.5C gr Retumbo shows 3374fps. (26" 1 in 10" twist)

My results for 168gr Barnes TSX with 114gr Retumbo averaged at 3526fps, no preasure signs. (28" 1 in 10" twist)

I don't see how 107gr could get that big of a bullet to go that fast. One of our chronies is off.

Rocky
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Old 03-05-2008, 07:57 PM
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I was thinking the same thing, very fast! Next time at the range I will have to take a proven rifle, to match it up. Could be that my ohler is messed up.
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