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Author Topic: My best tune yet  (Read 1091 times)

Hobbyman2007

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My best tune yet
« on: November 21, 2016, 11:32:10 AM »
After hundreds of hours ,different springs ,transferports ,hammer weights and let's not forget the tins of pellets . I think I've got the perfect tune for my frankengun. Pics of the rifle are to follow.



Hobbyman2007

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Re: My best tune yet
« Reply #1 on: November 21, 2016, 11:35:12 AM »
Here's a pic of the said rifle .

Dairyboy

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Re: My best tune yet
« Reply #2 on: November 21, 2016, 11:38:04 AM »
Very impressive I bet you love that gun!!
  • Outlook, WA
John 3:16

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.22/.30 WARP COBRA

Monkeydad1969

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Re: My best tune yet
« Reply #3 on: November 25, 2016, 04:54:38 PM »
Nice Frakengun.  Is that a Cothran tube?

Joe
  • Aurora, Colorado
Joe the P-Dawg Slayer!!!!!

Hobbyman2007

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Re: My best tune yet
« Reply #4 on: November 27, 2016, 08:29:15 AM »
Yes it's a Cothran tube , ordered in disco length but cut down to have a 9" long plenum after the drop down block. This rifle will outshoot its owner no doubt. 1/2" groups at 50 yards from a bench is not uncommon.

Monkeydad1969

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Re: My best tune yet
« Reply #5 on: November 27, 2016, 01:25:35 PM »
What block are you using?

Joe
  • Aurora, Colorado
Joe the P-Dawg Slayer!!!!!

Hobbyman2007

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Re: My best tune yet
« Reply #6 on: November 27, 2016, 02:23:05 PM »
I managed to find a couple QB79 blocks for my builds. Drilled and tapped to 10-32 x3 in a better location than stock (1/4 " material before end of tube )

Christopher

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Re: My best tune yet
« Reply #7 on: December 01, 2016, 06:17:59 PM »
Looks like all of your hard work has paid off. That's a very impressive tune. What size porting do you have?

Thanks for sharing,
Chris
  • dead end road KY

Hobbyman2007

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Re: My best tune yet
« Reply #8 on: December 02, 2016, 04:03:49 AM »
I'm using full .250 porting throughout. It goes against what is the norm (.180 to .2 ) but it works for me . I was going to build a hammer ( 100 fpe )from this one at first but changed direction ,which explains the huge ports.