Si.F Posted May 12, 2021 Report Share Posted May 12, 2021 Hi all looking for some sound advice and this is always the place to go 1st. was using my 525 at the weekend, 1st time for a while and maybe I am being a bit obsessive, but wanted to check before taking it to a gun smith. I have attached some photos to try and help explain.. it is multi choke, which are always checked prior to using and after, taken out and cleaned, but as it was a bit sunny during the shoot, I noticed the end of the barrels distorted the reflection, with naked eye and out of the sun doesn't appear to be any issues. But the distortion got me worrying that the barrels may have bulged. the main question being are the 525 barrels normally like this, at the section of the chokes ( as my Beretta doesn't have this distortion also multi choke), or is it possible I have over tightened the chokes and caused the barrels to bulge hopefully have explained sufficiently many thanks Si Quote Link to comment Share on other sites More sharing options...
hofk Posted May 12, 2021 Report Share Posted May 12, 2021 Is it were the chokes finish, and on both sides of the barrel in the same place. Quote Link to comment Share on other sites More sharing options...
ianspire Posted May 12, 2021 Report Share Posted May 12, 2021 Just checked the barrels on my 525, no step where the chokes are, invector plus barrels if that makes a difference Quote Link to comment Share on other sites More sharing options...
8 shot Posted May 12, 2021 Report Share Posted May 12, 2021 I think you'll find it's for the chokes my Miroku 7000 was exactly the same. If the chokes still screw in and out you should be fine. Also look at the top and middle rib they should taper in slightly Quote Link to comment Share on other sites More sharing options...
Scully Posted May 12, 2021 Report Share Posted May 12, 2021 My S&W pump is the same. It looks swelled where the chokes are, much more noticeable than the ‘bulges’ in your photos. Nothing to worry about in my opinion. Quote Link to comment Share on other sites More sharing options...
Si.F Posted May 12, 2021 Author Report Share Posted May 12, 2021 (edited) 11 minutes ago, 8 shot said: I think you'll find it's for the chokes my Miroku 7000 was exactly the same. If the chokes still screw in and out you should be fine. Also look at the top and middle rib they should taper in slightly good point, the variation is exactly same for both barrels where the chokes finish. Also done another check with a metal ruler and they do taper in slightly no gaps or problems on the rib. Chokes go in and out as before without any issues. Edited May 12, 2021 by Si.F Quote Link to comment Share on other sites More sharing options...
hofk Posted May 12, 2021 Report Share Posted May 12, 2021 21 minutes ago, hofk said: Is it were the chokes finish, and on both sides of the barrel in the same place. Think it will be normal as most Miroku's (factory chokes) seam to be the same. Quote Link to comment Share on other sites More sharing options...
Blueflame Posted May 12, 2021 Report Share Posted May 12, 2021 Hi, your photos show a very precise profile & uniform increase in barrels diameter on both barrels . This would be the standard manufactured profile to enable the barrels to be machined for screw-in chokes. If there were a problem with the barrels then you wouldn’t get both barrels damaged/ bulged in exactly the same place ; that is to say any bulges would be irregular. So nothing to worry about. Just keep the threads/ bore clean, lubricated and screwed-in firmly as normal practise. Quote Link to comment Share on other sites More sharing options...
Smokersmith Posted May 12, 2021 Report Share Posted May 12, 2021 This Quote Link to comment Share on other sites More sharing options...
mpmilo Posted May 12, 2021 Report Share Posted May 12, 2021 Ive got two 525 sporter ones, and they are both the same as op s. i dont normally notice the slight bulge apart from when the gun is hot or when shooting flush chokes and the barrel ends get a bit sooty. Quote Link to comment Share on other sites More sharing options...
222mark Posted May 12, 2021 Report Share Posted May 12, 2021 A Browning 325 i had was exactley the same, perfectley normal. Quote Link to comment Share on other sites More sharing options...
DUNKS Posted May 12, 2021 Report Share Posted May 12, 2021 just measured my ten year old 525 12g barrels with invector plus chokes. Although I have never noticed it before the barrels are not parallel from breach to muzzle the external dia does slowly increase along the length till about where the chokes are and then there is a positive increase.. Measured with my micrometre. So dont worry. Quote Link to comment Share on other sites More sharing options...
reindeer Posted May 13, 2021 Report Share Posted May 13, 2021 Nothing wrong here. If bulging as a result of high pressure would happen in a multi choke gun, it would be no further forward that the spot where the choke meets the bore. Your can check this spot with a choke tube held against the outside of the barrel and flush with the barrel end. Quote Link to comment Share on other sites More sharing options...
Si.F Posted May 13, 2021 Author Report Share Posted May 13, 2021 Thanks for all the replies, and reassurance. for some reason not having noticed it before I got it into my head it was a real safety issue. I should stick to my fixed choke SBS and not worry to much!! Quote Link to comment Share on other sites More sharing options...
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