steve1066 Posted November 11, 2021 Report Share Posted November 11, 2021 Hi All Have any of you Prosport owners come across this pitting to the action ? Photo attached The gun is cleaned regularly, don’t load my own cartridges but just can’t think what may have caused the pitting. Thanks Folks Quote Link to comment Share on other sites More sharing options...
London Best Posted November 11, 2021 Report Share Posted November 11, 2021 Looks like the barrel has been closed onto grit or unburnt powder as there are no marks where the cartridge sits. Quote Link to comment Share on other sites More sharing options...
TIGHTCHOKE Posted November 11, 2021 Report Share Posted November 11, 2021 Is there similar corrosion on the barrel face? Quote Link to comment Share on other sites More sharing options...
steve1066 Posted November 11, 2021 Author Report Share Posted November 11, 2021 1 hour ago, TIGHTCHOKE said: Is there similar corrosion on the barrel face? No nothing at all, in perfect flat condition. 1 hour ago, London Best said: Looks like the barrel has been closed onto grit or unburnt powder as there are no marks where the cartridge sits. It won’t be grit because the tolerances are so fine the gun wouldn’t close and it is outside the area for burnt powder. Quote Link to comment Share on other sites More sharing options...
Charliedog Posted November 11, 2021 Report Share Posted November 11, 2021 Have a 725 sporter (not prosport) with lots of rounds through it and no marks like that (looks new), never seen anything like that Quote Link to comment Share on other sites More sharing options...
Gordon R Posted November 11, 2021 Report Share Posted November 11, 2021 Ten year warranty on the action. Quote Link to comment Share on other sites More sharing options...
JTaylor91 Posted November 11, 2021 Report Share Posted November 11, 2021 41 minutes ago, Gordon R said: Ten year warranty on the action. As long as he is the original purchaser. Quote Link to comment Share on other sites More sharing options...
steve1066 Posted November 11, 2021 Author Report Share Posted November 11, 2021 42 minutes ago, Gordon R said: Ten year warranty on the action. Yes running it back to Malmö on Monday to send off to Browning, they have already replaced the stock due to a crack! 1 hour ago, Charliedog said: Have a 725 sporter (not prosport) with lots of rounds through it and no marks like that (looks new), never seen anything like that My son also has a 725 and his is spotless and new looking. Quote Link to comment Share on other sites More sharing options...
TIGHTCHOKE Posted November 12, 2021 Report Share Posted November 12, 2021 Many years ago a friend bought a brand new Belgian Browning B2 after about 6 months use it started to show marks in a similar area. Browning initially didn't want to know but took it back and leant him a comparable gun while they investigated the metal. Dave was an agricultural engineer and was working for KHD Deutz at the time, he had the action Rockwell tested and the results were not very good. I can only presume that someone dropped the ball or it was a "Friday" gun. Good luck getting it sorted. Quote Link to comment Share on other sites More sharing options...
Gunman Posted November 12, 2021 Report Share Posted November 12, 2021 Not saying it is but slamming the actin shut can cause this Quote Link to comment Share on other sites More sharing options...
steve1066 Posted November 12, 2021 Author Report Share Posted November 12, 2021 29 minutes ago, Gunman said: Not saying it is but slamming the actin shut can cause this Hi Gunman how would slamming the action cause this if both surfaces were initially perfectly flat? thank you Quote Link to comment Share on other sites More sharing options...
cardigun Posted November 12, 2021 Report Share Posted November 12, 2021 Sometimes I see marks like that round the fireing pin, caused by gas leakage round the primer. They polish off with fine wire wool. Quote Link to comment Share on other sites More sharing options...
steve1066 Posted November 12, 2021 Author Report Share Posted November 12, 2021 54 minutes ago, cardigun said: Sometimes I see marks like that round the fireing pin, caused by gas leakage round the primer. They polish off with fine wire wool. Thanks Cardigan, I will give it a try but I think that the pitting is too deep. Quote Link to comment Share on other sites More sharing options...
wymberley Posted November 12, 2021 Report Share Posted November 12, 2021 1 hour ago, steve1066 said: Hi Gunman how would slamming the action cause this if both surfaces were initially perfectly flat? thank you Funny thing is cavitation. Quote Link to comment Share on other sites More sharing options...
steve1066 Posted November 12, 2021 Author Report Share Posted November 12, 2021 2 hours ago, wymberley said: Funny thing is cavitation. Thanks Wymberley, I am aware of hydro cavitation but could you please explain cavitation where no water is involved? Quote Link to comment Share on other sites More sharing options...
wymberley Posted November 12, 2021 Report Share Posted November 12, 2021 (edited) 1 hour ago, steve1066 said: Thanks Wymberley, I am aware of hydro cavitation but could you please explain cavitation where no water is involved? Sadly, no. I have only had to contend with the phenomenon with high pressure hydraulic (oil) systems. However, as we have heat, pressure, the residue from rapid combustion and possibly water vapour all in the one area, I wouldn't be averse to gambling some of next month's pension on the possibility that the cause of the damage is in some way related to the phenomenon. For the non technical folk, Googling "hydraulic cavitation" should throw up a picture of the resultant damage it can cause. Edited November 12, 2021 by wymberley Quote Link to comment Share on other sites More sharing options...
Gunman Posted November 12, 2021 Report Share Posted November 12, 2021 8 hours ago, wymberley said: Funny thing is cavitation. All I can say is it does .I dont no why , its something I've seem many times Quote Link to comment Share on other sites More sharing options...
Graham M Posted November 12, 2021 Report Share Posted November 12, 2021 (edited) Seen the same thing happen in castings where the metal has been contaminated whilst casting. Browning actions forged but even so contaminated steel could be the cause. Edited November 12, 2021 by Graham M Quote Link to comment Share on other sites More sharing options...
steve1066 Posted November 12, 2021 Author Report Share Posted November 12, 2021 12 minutes ago, Graham M said: Seen the same thing happen in castings where the metal has been contaminated whilst casting. Browning actions forged but even so contaminated steel could be the cause. Thanks Graham M, out of all the suggestions up to now i feel this is the most likely. Quote Link to comment Share on other sites More sharing options...
DUNKS Posted November 13, 2021 Report Share Posted November 13, 2021 17 hours ago, steve1066 said: Thanks Graham M, out of all the suggestions up to now i feel this is the most likely. I agree but if so why has the fault followed the shape of the top barrel. Be very interesting to see the outcome of this one. Quote Link to comment Share on other sites More sharing options...
Graham M Posted November 13, 2021 Report Share Posted November 13, 2021 (edited) Funnily enough the whole face seems to be affected to a certain degree but mainly at the top. I wonder if browning are starting to have quality control issues, because a friend who has a new 725 has just shown me his gun where the right-hand ejector has completely ejected itself from the gun. The ejector retaining pin has unscrewed itself allowing the whole thing to shoot out with the cartridge. Looking through the web this seems to be happening to quite a few of these guns https://www.trapshooters.com/threads/browning-725-ejector-retaining-pin-screw-popped-off.846343/ Edited November 13, 2021 by Graham M Quote Link to comment Share on other sites More sharing options...
steve1066 Posted November 13, 2021 Author Report Share Posted November 13, 2021 1 hour ago, Graham M said: Funnily enough the whole face seems to be affected to a certain degree but mainly at the top. I wonder if browning are starting to have quality control issues, because a friend who has a new 725 has just shown me his gun where the right-hand ejector has completely ejected itself from the gun. The ejector retaining pin has unscrewed itself allowing the whole thing to shoot out with the cartridge. Looking through the web this seems to be happening to quite a few of these guns https://www.trapshooters.com/threads/browning-725-ejector-retaining-pin-screw-popped-off.846343/ Hi Graham M Maybe they are, I have had the stock replaced due to a split across the grip, so will be interested once Browning take a look in the next couple of weeks. I am not dismissing Wymberley,s cavitation as this could happen if the area was put under pressure from the cartridge ignition?.. Quote Link to comment Share on other sites More sharing options...
Graham M Posted November 13, 2021 Report Share Posted November 13, 2021 (edited) The area is above the area where the rear of the cartridge would be, so it would seem to be away from any direct pressure. I have an old hammergun and have nothing like that on my gun so why would this happen on a strong gun like a Browning??? Obviously when the forging is machined it removes a certain amount of metal and I'm wondering if they have made their tolerances too tight and weren't able to remove enough material without causing a problem with dimensions. Just seems to be a rough finish. Edited November 13, 2021 by Graham M Quote Link to comment Share on other sites More sharing options...
steve1066 Posted November 13, 2021 Author Report Share Posted November 13, 2021 27 minutes ago, Graham M said: The area is above the area where the rear of the cartridge would be, so it would seem to be away from any direct pressure. I have an old hammergun and have nothing like that on my gun so why would this happen on a strong gun like a Browning??? Obviously when the forging is machined it removes a certain amount of metal and I'm wondering if they have made their tolerances too tight and weren't able to remove enough material without causing a problem with dimensions. Just seems to be a rough finish. Hi Graham M, This pitting wasn’t on the gun when I purchased it new, this has appeared within the last 9 months or so, I have had the gun for about 3 years and have shot around 6000 cartridges, it seems to have puzzled everyone up till now. Quote Link to comment Share on other sites More sharing options...
Graham M Posted November 13, 2021 Report Share Posted November 13, 2021 Perhaps it's gas erosion. Certainly a puzzle Quote Link to comment Share on other sites More sharing options...
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