T/C Contender 300 blackout strangeness

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GregP42
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T/C Contender 300 blackout strangeness

Post by GregP42 » Fri Nov 01, 2019 8:10 pm

Hey guys,

Start with the specs first, 16.25" long, 1-8" twist MGM barrel.

Was working with this one today on 110gr loads, getting ok results. So I decided to shoot some of my Hornady 190gr sub-x rounds, this is where it got weird, at least for me, 50 yards was the range, the 110gr are shooting point of aim at that distance, but the 190gr are shooting high, and not just a little bit, they are shooting 15" higher than the 110gr at the same distance. So, any thoughts besides gravity might be upside down at the range?

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20X11
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Re: T/C Contender 300 blackout strangeness

Post by 20X11 » Fri Nov 01, 2019 10:24 pm

Sub sonic rounds behave differently than supersonic.

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GregP42
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Re: T/C Contender 300 blackout strangeness

Post by GregP42 » Fri Nov 01, 2019 11:50 pm

Yep, the only thing I can think of is dwell time in the barrel and the recoil impulse making it go higher. Other than that, if they are leaving on the same plain as each other is figures that the slower heavier bullet would drop more first.

Greg
20X11 wrote:
Fri Nov 01, 2019 10:24 pm
Sub sonic rounds behave differently than supersonic.
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bangbangping
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Re: T/C Contender 300 blackout strangeness

Post by bangbangping » Sat Nov 02, 2019 6:18 pm

GregP42 wrote:
Fri Nov 01, 2019 11:50 pm
Yep, the only thing I can think of is dwell time in the barrel and the recoil impulse making it go higher.
That's it. I've had it happen in a few rifles when there was a big disparity in bullet weight and speed.

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