Canadian Airgun Forum

The #1 Community for Airguns in Canada!
It is currently Fri Nov 26, 2021 5:48 pm

All times are UTC - 5 hours


The Canadian Airgun Forums are a place for people to discuss and learn about airguns and the airgunning sport in Canada. There are lots of discussions about airguns, airgun accessories, reviews, modification and repair information, airgun events, field target and free classifieds!

 

You need to register before you can post: click the register link to proceed. Before you register, please read the forum rules. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload your own pictures, and access many other special features. Registration is fast, simple, and absolutely free! To start viewing messages, select the forum that you want to visit from the selection below.






Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: extended probe
PostPosted: Thu Aug 26, 2021 8:58 pm 
Offline

Joined: Thu Aug 05, 2021 5:36 pm
Posts: 26
As a relative newcomer to the world of air gun mods, I keep seeing references to "extended probes" as a common upgrade. Can someone school me on the advantage of this modification? Is is simply a longer probe that pushes the pellet a bit further up the breech? How does that affect performance?
Thanks
John D.


Top
 Profile  
 
 Post subject: Re: extended probe
PostPosted: Thu Aug 26, 2021 10:47 pm 
Offline
User avatar

Joined: Wed Jul 26, 2017 7:01 pm
Posts: 3673
Location: GTA, ON
I think this extended probe mod usually related to Crosman?

I did one on my 2240 and didn't see anything similar for my other guns... I am new to this deep sea and lack of some general knowledge too...

It's doing exactly what you mentioned above. And as the info I got when I doing it, seating the pellet deeper also help making it leave the transfer port slightly a little bit more distance which helps the air flow working better when it blow up from the TP and pushing the pellet out...

Honestly speaking, I didn't see any difference before and after... :eek:

What's the gun you want to put the entended probe on?

_________________
CZ200s Color Laminated tuned to 10fpe
AA ProSport 177 Walnut in 12fpe
FWB300S Universal
HW 30s / 35e
HW 40+Extender / Scoped P3 / 45 / 70 / 75
Russian Izzy 46M
2240 14" barrel carbine


Top
 Profile  
 
 Post subject: Re: extended probe
PostPosted: Thu Aug 26, 2021 10:54 pm 
Offline
User avatar

Joined: Mon Feb 11, 2013 12:46 am
Posts: 5050
here is a pretty good read on it
https://www.crosman-air-pistol-owners-f ... 741.0.html

_________________
"A candle loses nothing by lighting another candle"

Image


Top
 Profile  
 
 Post subject: Re: extended probe
PostPosted: Fri Aug 27, 2021 5:08 am 
Offline

Joined: Thu Oct 13, 2005 4:20 pm
Posts: 2081
Location: Spruce Grove AB
Basically what happens, some deeper skirted pellets will partially cover the transfer port. Longer probe can cure that. Or if you look at some of the older crosman guns, they used a ported bolt probe, or a flow through bolt. Usually my go to when I'm doing a build. With the ported bolt, you can set every projectile to the same depth. There's also no probe obstructing the air flow.

Rsterne probably has some really good write ups on the subject. I remember something about retractable probes.


Top
 Profile  
 
 Post subject: Re: extended probe
PostPosted: Fri Aug 27, 2021 1:39 pm 
Offline

Joined: Thu Aug 05, 2021 5:36 pm
Posts: 26
I have a flow through bolt coming from the US for my 2240xl, but I was wondering about the effects of the extended probe. As to whether or not they are effective on other makes, I do not know. I am open to suggestions for this on my Artimis M11 35cal and Crosman Nitro 22 cal. I figure it never hurts to look around and see what is available, what works, why, and what doesn't work, and why.
So thanks all for the clarification on what the probe actually does.
JD


Top
 Profile  
 
 Post subject: Re: extended probe
PostPosted: Fri Aug 27, 2021 4:22 pm 
Offline

Joined: Thu Aug 05, 2021 5:36 pm
Posts: 26
Ace wrote:

Wow! Thanks for that link, it was VERY informative, and I read all 11 pages of it. The original poster's testing of the 5 different probes was pretty enlightening, but so were some of the ideas that came out of it.
JD


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

phpBB SEO