kent Posted April 1, 2014 Report Share Posted April 1, 2014 Yep, mates mod' (T8 I think) has corroded the screw cut on his stainless Sako 75. Not to the extent it needs re-threading but it's getting there. stainless is contaminated by contact with ferrous, even actions such as cutting on a std guillotine blade can do this. In fairness its not relevant to our use. A newly threaded chromo moly barrel muzzle should ideally be blued though its rarely seen but always lubed. Leaving an unlubed thread and moderator fixed in place has lead to such crazy things as broken stocks as the owner tries idiotic ways to free the two stuck parts. Quote Link to comment Share on other sites More sharing options...
Foxwit Posted April 1, 2014 Author Report Share Posted April 1, 2014 What grease would you use to lube the tread? Quote Link to comment Share on other sites More sharing options...
kent Posted April 1, 2014 Report Share Posted April 1, 2014 What grease would you use to lube the tread? Most high temperature stuff will do a job, as we are not protecting from long term storage seizure ( as the moddy is and should be removed) Quote Link to comment Share on other sites More sharing options...
kent Posted April 1, 2014 Report Share Posted April 1, 2014 I bought my first centrefire Tikka M595 .223 early last year. Excited by the purchase, and the stunning wood I bought it, unable to test fire and with a lack of knowledge on my part. Travelled quite a distance too to collect. Noticed it was a bit rough at the end of the barrel, but fella assured me it was fine. Got it home, tried to zero and it was doing dinner plate groups, 3-4" at best. Took it to my smiths, bore scoped. Crown and 2-3" in was toast, totally knackered. The cause of this, storing the rifle with the mod on. *** Had to fork out for a rebarrel, at just under £500 for a Bergara. Moral of the story, before putting it away, take the mod off and give it a pull through at least, depending on how soon your next shot will be. Yes your POI will shift on a clean barrel against a fouling round, but well worth it. Jonathan The only way to have 100% repeatable return to zero is a clean barrel, if you get shift you only nearly cleaned the barrel not really cleaned it. Accuracy is about repeatability and you cannot repeat the exact state of dirtiness. Quote Link to comment Share on other sites More sharing options...
Dunkield Posted April 1, 2014 Report Share Posted April 1, 2014 The only way to have 100% repeatable return to zero is a clean barrel, if you get shift you only nearly cleaned the barrel not really cleaned it. Accuracy is about repeatability and you cannot repeat the exact state of dirtiness. You can only repeat a clean barrel shot once. So what do you do it you need to take a second, rush home and clean your barrel all over again? Quote Link to comment Share on other sites More sharing options...
Dunkield Posted April 1, 2014 Report Share Posted April 1, 2014 I only ever need one etc etc Quote Link to comment Share on other sites More sharing options...
kent Posted April 1, 2014 Report Share Posted April 1, 2014 You can only repeat a clean barrel shot once. So what do you do it you need to take a second, rush home and clean your barrel all over again? No but once that one shot is taken (perhaps the only and most important) the gun wont go totally off zero (indeed it will be no worse than the other pre- fouled principle). its not practical to fire a round once you arrive but the fact remains you cannot replicate a state of dirty, has the crud hardened in the barrel etc.? so many variables. Its surprising how many test a hunting rifles accuracy with groups of three to five consecutive shots yet so few bother to test CCB and return to zero, yet even when culling hard or shooting vermin its rare to shoot three consecutive shots Quote Link to comment Share on other sites More sharing options...
Thunderbird Posted April 1, 2014 Report Share Posted April 1, 2014 What about on rimfires? What do people do there? Quote Link to comment Share on other sites More sharing options...
1in9 Posted April 1, 2014 Report Share Posted April 1, 2014 I always remove my moderators, three reasons: 1. They are prone to condesation, moisture = bad, especially when you get crud laden drips working their way back down into barrel and action. 2. Ever tapped a mod onto a table? You don't want dry particulates and soot in your barrel every time the gun gets bumped while upright. 2. Means the threads are always oiled and clean so no risk of it getting stuck If you do decide you are going to leave them on then you should definitely store them barrel down on something padded. Quote Link to comment Share on other sites More sharing options...
Bewsher500 Posted April 1, 2014 Report Share Posted April 1, 2014 Yes your POI will shift on a clean barrel against a fouling round, but well worth it. why would it shift? just removing and refitting a mod is not enough to screw up accuracy i take my mod off every time I dont clean it every shot (some would argue at all! at least 30-40-50 shots between cleans on the ,222) POI never changes Quote Link to comment Share on other sites More sharing options...
kent Posted April 1, 2014 Report Share Posted April 1, 2014 If your gun shifts zero on removing and re-fitting a moderator it is quite possible there is something amiss with the back bush to baffles arrangement or similar. It shouldn't happen but it has been known the best thing is to find out why and sort it, not leave it on and mess up your bore, crown, thread or barrel OD finish Quote Link to comment Share on other sites More sharing options...
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