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Author Topic: 22 hornet barrel for old topper  (Read 533 times)

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Offline vacek

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22 hornet barrel for old topper
« on: July 07, 2011, 06:24:59 PM »
In 1985 I had an 22 Hornet H&R Topper reamed to 223 for a gold hunting trip to the Australia Outback.  I have never been really pleased with this conversion as .223 seem to have a lot of misfires in the H7R.  How does one go about getting a 22 hornet barrel for an older topper?
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Offline cowboyup453

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Re: 22 hornet barrel for old topper
« Reply #1 on: July 07, 2011, 06:59:09 PM »
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Offline Catshooter45

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Re: 22 hornet barrel for old topper
« Reply #2 on: July 08, 2011, 07:42:02 AM »
The Hornet barrels show up from time to time.
 
Another alternative is to rechamber it to 225 Winchester.  I did that with my 223 and it has never given me any trouble.  I like rimmed cartridges in these rifles.
 
 
Cat
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Offline quickdtoo

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Re: 22 hornet barrel for old topper
« Reply #3 on: July 08, 2011, 09:48:31 AM »
Quote from: Catshooter45 on July 08, 2011, 07:42:02 AM
The Hornet barrels show up from time to time.
 
Another alternative is to rechamber it to 225 Winchester.  I did that with my 223 and it has never given me any trouble.  I like rimmed cartridges in these rifles.
 
 
Cat

The Topper barrel wouldn't be suitable for the 225 Win, breech thrust with top loads at 60kpsi would be 8392 lbs which is way beyond the platform strength limit, both for the cast iron frame and the soldered/brazed underlug, even the 223 Rem is questionable at 6107 lbs breech thrust at 55kpsi. For comparison, the 30-30 @42kpsi has 5819 lbs breech thrust.
 
Tim
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Offline geezerbiker

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Re: 22 hornet barrel for old topper
« Reply #4 on: July 08, 2011, 10:01:45 AM »
Quote from: vacek on July 07, 2011, 06:24:59 PM
I have never been really pleased with this conversion as .223 seem to have a lot of misfires in the H7R.

Have you considered installing a Wolf hammer spring to boost the hammer strike?  I think this could help set of the primers and it's a cheap modification...

Tony
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Offline Catshooter45

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Re: 22 hornet barrel for old topper
« Reply #5 on: July 09, 2011, 08:53:51 AM »
That's a good point Quick.  I missed the Topper part.  Never mind! :)
 
 
Cat
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Offline gcrank1

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Re: 22 hornet barrel for old topper
« Reply #6 on: July 09, 2011, 11:15:03 AM »
More than a weak hammer spring it might be a limited firing pin protrusion, especially if there is a little headspace issue from the rechamber.
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