Trever
Well-Known Member
Hate revive an old one but it interest me. What kind of velocity would you see with a 28-30" barrel in this chamber?
270 Sherman
- Thread starter CogburnR
- Start date
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With max loads and a 30" tube I think these speeds are doable:
165g Matrix 3100fps,
150 Berger 3200fps,
130 Berger 3300fps.
It is probably the most performance you can get from a 270 case. The finished cases run around 10% more powder capacity than the same fired case before fire forming.
165g Matrix 3100fps,
150 Berger 3200fps,
130 Berger 3300fps.
It is probably the most performance you can get from a 270 case. The finished cases run around 10% more powder capacity than the same fired case before fire forming.
I agree, those numbers are similar to that off my .270 AI! I've exceeded 3100 FPS with 175 Matrix but with too much pressure and accuracy started to open up; I've settled for 2993 FPS with 175 Matrix as my accuracy load at least for now.
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Wow that's impressive! This is the reason I wish Hornady would introduce a .277cal A-MAX in a heavy weight such as a 162gr to push them in the .270 AI, .270 Sherman, .270 WSM, and .270 WBY. Would love to have a .270 AI or .270 Sherman one day.
elkaholic
Well-Known Member
This is some good info for you Trever. The Sherman should add 50' to an A.I. everything else equal. Bottom line, 3100' with a 165 might be a moderate load.......Rich
Trever
Well-Known Member
I will be going with the Sherman design for sure. If nothing else comes about.
It's nice to get magnum performance out a non-magnum chambering. I'm currently performing around my friend's factory Weatherby Accumark in 7MM Mag using HSM 180 Berger VLD (2845 FPS) with my 175 Matrix VLD at 2993 FPS.
It's nice to get magnum performance out a non-magnum chambering. I'm currently performing around my friend's factory Weatherby Accumark in 7MM Mag using HSM 180 Berger VLD (2845 FPS) with my 175 Matrix VLD at 2993 FPS.
That's very impressive! What kind of energy does your 175gr load have at 800 yards? Seems like it could be a good elk and deer rifle for even the farther ranges.
elkaholic
Well-Known Member
It's nice to get magnum performance out a non-magnum chambering. I'm currently performing around my friend's factory Weatherby Accumark in 7MM Mag using HSM 180 Berger VLD (2845 FPS) with my 175 Matrix VLD at 2993 FPS.
Feenix......you could always run the Sherman reamer into your chamber and pick up some more velocity while using your same brass, if you so choose........Rich
Ain't it fun!
1946 FPS and 1472 FT-LBS.
Feenix......you could always run the Sherman reamer into your chamber and pick up some more velocity while using your same brass, if you so choose........Rich
Ain't it fun!
Rich,
Fun indeed! I'll keep that in mind. I might do your 6.5 Sherman first though.
I'll ping you for info when I'm ready. Cheers!
Ed
elkaholic
Well-Known Member
Rich,
Fun indeed! I'll keep that in mind. I might do your 6.5 Sherman first though.
I'll ping you for info when I'm ready. Cheers!
Ed
Sounds good! The 6.5 is a bigger increase over the A.I. than a 270 because the 6.5 A.I. is based on the '06 case and the Sherman isn't.......Rich
