Choke Help

[LucassDouds]

Alright guys. I have a little AYA No4 BLE with 25Inch Barrels, i was told it was fixed choke at half and quarter. However when i was out with my cousin on the weekend he looked at the Numbers on the under side of the barrels and they say the following

Choke
17.4
18.5

Choke
17.8
18.5

now that's up under the chamber, but about an inch or two too the left of these markings, on both barrels is the stamp 18.3

now my cousin says he thinks the gun is actually choked really tight, full and 3/4 maybe.

so i got home and lent my mates 12gauge choke reader thing that you drop in the end. and surely enough it says its choke at half and quarter.

my question is which will be right? should i ignore the choke reader and got off the stamped numbers or what?

I am gonna take it too my local gun room but i cant get there till next weekend and Im really curious!

ill try and attach some photos.

any help would be appreciated.

Cheers

[LucassDouds]

Pic

[JohnfromUK]

1.1 mm constriction is about 43 thousandths of an inch, which is a tight full choke.

0.7 mm constriction is 27 thousandths of an inch which is about 3/4 choke.

 

These may well be approximate measurements.

 

I had an AyA Yeoman some years ago and that came as standard half and full.

 

What you need to do is have it measured - or better still pattern it. Remember that it may have been opened up from what it was at proof.

 

'Drop in the end' gauges are NOT a good guide - as they are absolute diameter measures - choke is the degree of constriction.

[LucassDouds]

1.1 mm constriction is about 43 thousandths of an inch, which is a tight full choke.

0.7 mm constriction is 27 thousandths of an inch which is about 3/4 choke.

 

These may well be approximate measurements.

 

I had an AyA Yeoman some years ago and that came as standard half and full.

 

What you need to do is have it measured - or better still pattern it. Remember that it may have been opened up from what it was at proof.

 

'Drop in the end' gauges are NOT a good guide - as they are absolute diameter measures - choke is the degree of constriction.

So I'm gonna be better off just taking it up too my local gun smiths too know for certain?

 

Thanks again

[sishyplops]

Most Spanish guns particularity AYA's form the 70's are choked 1/2 & full, (well all three of mine are) both my uggys were 1/2 & full as well as they were built as walked up guns not driven, look got the stars on the barrels , should be 1 & 3 stars unless they have been eased

[LucassDouds]

Most Spanish guns particularity AYA's form the 70's are choked 1/2 & full, (well all three of mine are) both my uggys were 1/2 & full as well as they were built as walked up guns not driven, look got the stars on the barrels , should be 1 & 3 stars unless they have been eased

No stars on mine bud. iv tried too upload some pics but it isn't working

[JohnfromUK]

So I'm gonna be better off just taking it up too my local gun smiths too know for certain?

 

Thanks again

Yes - any markings on the barrels were put there at a particular time (usually at proof) and the gun may well have had the chokes opened out since.

 

Choke can be measured (approximately) by measuring the constriction in the muzzle area compared to the main barrel area; this is reasonably accurate, but a given gun will pattern differently with different cartridges - for example, plastic cup wads usually tighten the pattern compared to fibre wads. Strictly, you should pattern the gun at 40 yards and measure the percentage inside a 30" circle drawn around the centre of the pattern (NOT the aim mark) with the cartridge concerned from a ready 'fouled' barrel - but this is all rather time consuming - and the measure of constriction is usually sufficient

Edited March 6, 2016 by JohnfromUK

[Stonepark]

The empirical measurements are less important than patterning the gun and seeing what the actual results are.

[kody]

Never known a aya number 4 to have 25 inch barrels have they been chopped

[sishyplops]

Agree with full choke on this, 26" and 28" is the most common for no4 Aya's , the aya XXV is a 25" generally with Churchill rib

[JohnfromUK]

A significant number of AyAs were built to order - which might include 'non standard' barrel length. I have a friend who has an AyA Model 53 with 25" barrels and a standard (i.e. non Churchill) rib. AyA have confirmed it was made like this.

 

If you send the serial number to AyA they will confirm the model and basic specification.

[LucassDouds]

A significant number of AyAs were built to order - which might include 'non standard' barrel length. I have a friend who has an AyA Model 53 with 25" barrels and a standard (i.e. non Churchill) rib. AyA have confirmed it was made like this.

 

If you send the serial number to AyA they will confirm the model and basic specification.

I emailed AYA before so should get some info back off them.

[TONY R]

My no 4 is 26 inch barrels and is 18 though choke one barrel and 29 though the other. Gun came like that brand new in the early 1970s. I had it measured when i got it about 15 years ago.