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Max Online: 16728 @ 03/25/12 08:51 AM
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#5547136 - 01/16/15 02:25 PM .257 Bob Velocity?
aggie-01 Offline
Outdoorsman

Registered: 07/21/08
Posts: 78
Loc: Temple
I was wondering if anyone had an estimate on the velocities that I am getting out of these loads. I dont have access to a chrony. They are all very accurate out of my rifle. Below are the specifics.
Rem 722 .257 Roberts
OAL 2.833
Win LR primer

1)Sierra 87gr Spitzer
42gr IMR4350

2)Sierra 87gr Spitzer
46gr IMR 4350

3)Sierra 100gr Spitzer
43gr IMR 4350

4)Sierra 117gr SPBT
43gr IMR 4350

Thanks for the help
_________________________
Mitch

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#5547153 - 01/16/15 02:39 PM Re: .257 Bob Velocity? [Re: aggie-01]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 21397
Loc: Texas
Barrel length?
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#5547155 - 01/16/15 02:41 PM Re: .257 Bob Velocity? [Re: aggie-01]
aggie-01 Offline
Outdoorsman

Registered: 07/21/08
Posts: 78
Loc: Temple
Not sure but I will need to look when I get home.
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Mitch

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#5547196 - 01/16/15 03:02 PM Re: .257 Bob Velocity? [Re: aggie-01]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 21397
Loc: Texas
Originally Posted By: aggie-01

Below are the specifics.
Rem 722 .257 Roberts
OAL 2.833
Win LR primer

1)Sierra 87gr Spitzer
42gr IMR4350
2790fps

2)Sierra 87gr Spitzer
46gr IMR 4350
3063fps

3)Sierra 100gr Spitzer
43gr IMR 4350
2839fps

4)Sierra 117gr SPBT
43gr IMR 4350
2800fps



Velocities calculated with internal ballistic calculator with barrel length of 22 inches. Your mileage may and probably will vary, depends a lot on fast barrel or slow barrel. Have seen that software be spot on or off by 100 or more fps. The best way to know for sure is a chronograph.
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