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Differences between 7TCU and 7x45mm ingram
Discussion regarding the reloading of ammunition and tuning of loads for accuracy
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition

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skyav8r
Rookie Member
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Joined: Dec 16, 2007
Posts: 2

PostPosted: Sun Dec 16, 2007 4:25 pm    Post subject: Differences between 7TCU and 7x45mm ingram Reply with quote

what is the difference between these two cartridges. all i noticed was the shoulder angle. But the velocity is greater with the 7x45.
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Dimitri
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Joined: Nov 25, 2005
Posts: 5906
Location: Southern Ontario

PostPosted: Sun Dec 16, 2007 5:42 pm    Post subject: Re: Differences between 7TCU and 7x45mm ingram Reply with quote

Welcome to the forums Howdy

The 7mm TCU and the 7x45mm Ingram (7mm-223 Improved) are close it looks like, execpt the TCU has a case length of .010" shorter then the Ingram, and the TCU only tapers .0035 from the back to the neck, while the Ingram tapers .0055" from the back to the neck. Is all I can see looking at the drawings as differences. Smile

Dimitri

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A thousand hills, but no birds in flight, ten thousand paths, with no people's tracks. A lonely boat, a straw-hatted old man, fishing alone in the cold river snow.
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skyav8r
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PostPosted: Sun Dec 16, 2007 6:56 pm    Post subject: Re: Differences between 7TCU and 7x45mm ingram Reply with quote

yeah, it just doesn't look like enough difference for the ingram to produce around 300 more f.p.s. with each bullet weight. I have a tcu and it shoots awesome. i just noticed the speed of the ingram and was wondering how.
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Dimitri
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Joined: Nov 25, 2005
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Location: Southern Ontario

PostPosted: Sun Dec 16, 2007 6:58 pm    Post subject: Re: Differences between 7TCU and 7x45mm ingram Reply with quote

Perhaps they are loaded to higher pressures or are using special powders like Hornady's Light Mag's to get thouse speeds ?? Confused

Dimitri

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