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PostPosted: Mon Oct 05, 2020 12:36 am 
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Castle02 wrote:
Anyone try shooting JSB Jumbo Heavies out of their PP700 with the 16" carbine barrel? Both JSB Jumbo Match and the Jumbo Heavy seem difficult to load.

Rich
Hmm maybe loading area needs to be enlarged a bit more?

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PostPosted: Mon Oct 05, 2020 9:25 am 
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Hello Rich, what caliber did you go with? I still have the parted off ends of those barrels and I’m going to measure them. Do you have a set of calipers? If you do can you measure about five pellets? Measure in thousands. Don’t know if you lube your pellets already but a good silicone lube helps also give the barrel a thorough cleaning. I cleaned them before they left my hands but won’t hurt to push a few more patches through. Send me some measurements on those pellets and we can decide how to solve this problem.
Jay


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PostPosted: Mon Oct 05, 2020 10:43 am 
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I went with the .22 barrel. I measured a handful of pellets from Jumbo Match and Jumbo Heavy. They all measure .2165. The breech measured .2106. I believe i was in the grooves for that measurement. I generally don‘t lube my pellets. If i need to polish it, what grit paste should i use?


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PostPosted: Mon Oct 05, 2020 6:47 pm 
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Hello Rich, wow something is going on if your measuring the breech that tight. I measured one of the ends I parted off those barrels and I was reading .216 across the grooves. If you want to lap it out you will have to with something fairly aggressive to start and finish it off with some polishing compound on a felt polishing cone. I would say start with 40 micron paste. I’m going to ask Wes to measure up the other .22 barrels I sent in this batch. I polished up the breeches on these barrels but I didn’t do any lapping to the stock breech.
Jay


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PostPosted: Mon Oct 05, 2020 10:01 pm 
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Castle02 wrote:
Anyone try shooting JSB Jumbo Heavies out of their PP700 with the 16" carbine barrel? Both JSB Jumbo Match and the Jumbo Heavy seem difficult to load.

Rich
I measured mine, it's 0.2015 to 0.2115 on different directions... I think it's affected by the grooves my digital micrometer touches...

I don't have JSB heavy, I use RS on my PP700 mostly. However I tried AA 16g and it's loaded very easily...

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PostPosted: Mon Oct 05, 2020 10:36 pm 
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I'll take a look at what I have here.

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PostPosted: Tue Oct 06, 2020 12:32 pm 
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Ok the one I have here also has the problem. Looks beautiful Jay, so nicely crowned and polished! Unfortunately it's .208 according to my calipers

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PostPosted: Tue Oct 06, 2020 12:53 pm 
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Hmmmm, only thing I can think is that I went and used the muzzle for the breech and they are choked. If that is the case this is on me!!! Wes do you know if these barrels are choked? They can be lapped out but you customers shouldn’t have to do that. I’m going to talk with Wes to see how we can fix this!!! Rich I’m so sorry for this pain in the rump, I know you have been waiting all summer for this barrel. This just might be my goof up and I will do what I have to do to fix the problem.
Jay


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PostPosted: Tue Oct 06, 2020 3:31 pm 
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I wouldn’t stress too much about it. We’ll get it figured it.


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PostPosted: Thu Oct 08, 2020 11:51 pm 
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Thanks Jay, you're a good man!

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PostPosted: Thu Oct 08, 2020 11:56 pm 
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I didn't realize the Snowpeak barrels were choked but they sure seem to be.

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PostPosted: Sun Nov 08, 2020 8:56 pm 
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Any news lately? the thread stopped a month ago.


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PostPosted: Sun Nov 08, 2020 9:15 pm 
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I have a new barrel on the way from Jay. Wes paid for the old barrel to be shipped back out of his own pocket.


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PostPosted: Mon Nov 09, 2020 1:30 am 
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What was wrong with the barrel? or better which is a good barrel vs stay away? How can I know when ordering?


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PostPosted: Mon Nov 09, 2020 4:27 am 
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wesb2007 wrote:
I didn't realize the Snowpeak barrels were choked but they sure seem to be.

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Checking for a barrel choke can be done by pushing a pellet through it using a carbon fiber rod. A good choke will be consistent in force and not open up along its path. This method can also be used to identify any loose/tight spots along the barrel and the leade.

A good barrel doesn't have to be expensive. Crosman barrels can be very good, especially when prepped and lapped.

A barrel doesn't need to be choked to be accurate though!

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