Jump to content
Sign in to follow this  
Big Al

HP steel through 3/4 choke

Recommended Posts

On 04/09/2019 at 21:09, Big Al said:

I've just done something new. I've read the manual for my gun.

I own 2 B525s, a grade 1 and a grade 5 and when it comes to hp steel I've always stuck to conventional advice and used no tighter than half choke. 

However,  on reading the B525 manual, it seems that they advocate using hp steel through 3/4 invector plus choke also. Hmmm. News to me.

I was wondering if anyone in PW has used HP steel through the factory 3/4 choke. I'm tempted to try it on my first duck flight on Saturday. 

If you knock Invector + Browning Factory chokes, those supplied with your 525, down a degree of that stated you arrive at a more accurate figure for the constriction of that specific choke. Browning's 525 3/4 (Steel Full) is actually half choke by conventional measurement. 

Share this post


Link to post
Share on other sites
6 hours ago, Uilleachan said:

If you knock Invector + Browning Factory chokes, those supplied with your 525, down a degree of that stated you arrive at a more accurate figure for the constriction of that specific choke. Browning's 525 3/4 (Steel Full) is actually half choke by conventional measurement. 

Is it? I didn't know that.

Are they all knocked down a level? I've never heard that before. Is the quarter a skeet?

Share this post


Link to post
Share on other sites

The Browning DS chokes are a bit bigger than the standards for choke. Half in a DS choke is close to quarter choke. Didn't think the invector plus was the same. I'll have to check when I can be bothered.

Looks like Uilleachan could be correct, copy and pasted from a USA site.

When I checked my 12ga Invector-plus factory flush chokes with a bore gauge to determine the true choke constriction I found the following:
Skeet / .000" constriction
IC / .004" constriction
Mod / .012" constriction
IM / .018" constriction
Full / .031" constriction

i shoot Briley aftermarket extended in half and what Briley call extra full at 40 thou to me is only standard full choke. Means my half choke is probably more 3/8th than half.  

 

 

 

Edited by figgy

Share this post


Link to post
Share on other sites

i generally use 32g 4 rc steel for pigeons and duck but shot 3in magnum 3s through 1/2 and 5/8ths chokes in my miroku and zilch nothing nada has happened to it

Share this post


Link to post
Share on other sites

 Big Al I shoot steel through a Briley 40 thou true full choke. My Briley half is also true at 20 thou. 

Stick your full choke in and see how it performs being only 34 thou it may shoot good patterns.

Share this post


Link to post
Share on other sites
On 21/09/2019 at 13:59, Big Al said:

Is it? I didn't know that.

Are they all knocked down a level? I've never heard that before. Is the quarter a skeet?

Yep, that indeed seems to be the case.

Bought some 2nd hand Teague Invector + chokes off of here a while back and began to notice the difference of travel using the Teague choke key. So whilst not as scientific as the exampled quoted by figgy above, by simply noting how much of the key will go into the aperture of the browning chokes, that shipped with the gun, versus the Teague invector + equivalent it was quite obvious that one was tighter than the other, despite both being marked with the same degree of restriction. 

 

Share this post


Link to post
Share on other sites

Uillcheanan,

Your method works just as well as a guide. You can tell how close say half Browning is to your half or quarter Teague. Compare one against the other and get very close to the actual measurements knowing what the teagues are.

Share this post


Link to post
Share on other sites
2 hours ago, Uilleachan said:

Yep, that indeed seems to be the case.

Bought some 2nd hand Teague Invector + chokes off of here a while back and began to notice the difference of travel using the Teague choke key. So whilst not as scientific as the exampled quoted by figgy above, by simply noting how much of the key will go into the aperture of the browning chokes, that shipped with the gun, versus the Teague invector + equivalent it was quite obvious that one was tighter than the other, despite both being marked with the same degree of restriction. 

 

That is really good to know. Thanks Uilleachan.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...