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250sav necked to 7mm..what vel. increase?

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28 February 2009, 11:09
Trax
250sav necked to 7mm..what vel. increase?
Necking 250sav to 7mm,
what vel. increase could one expect from 25cal-120gn to 7mm/120gn?
250sav shooters might also enlighten me as to what top end vel. youve achieved with 120gn pills... Smiler
28 February 2009, 17:01
6.5BR
That would be similar to the 7mm IHMSA and 7mm/6.5x47 Lapua.

I am confident you can get 2800-2900 or more depending on bbl length. I had a 7BR did 2878 in 21", and two 7/08s did 3050-3100, also 21" bbls.
28 February 2009, 21:20
bartsche
fishing38gr. IMR4831,oal=2.705, 2790 fps. could have gone higher but didn't. My rough calculations would be close to 2940 fps. beerforr the 7mm.roger


Old age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone..
28 February 2009, 22:35
Allan DeGroot
and building this would accomplish what exactly that would be different from simply buying a rfle chambered in 7mm-08?

and the 7mm-08 can do 3000-3150fps with 120gr bullets.

IMR4350 would be a MUCH better choice for either your 7mm-250 or 7mm-08 than IMR4831 would be.

AD


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01 March 2009, 03:23
bartsche
quote:
Originally posted by Allan DeGroot:
and building this would accomplish what exactly that would be different from simply buying a rfle chambered in 7mm-08?AD


EekerSince this is posted in Small Calibers Allan Has a point ! shocker

holycowYou would probably get warmer responses in the wildcat forum. beerroger


Old age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone..