GTA
All Springer/NP/PCP Air Gun Discussion General => Air Gun Gate => Topic started by: prosportfan on September 09, 2017, 09:32:08 AM
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Is it just me and I can't leave well enough alone or is it the air gunner in us that we always have two tinker with something to see if it makes our gun better or more accurate or just to see what the outcome is? Who knows. My whole point is saying all this is about lapping and polishing a barrel. How is it known if you do need it or not? Or lets say if you don't need it will your Barrel still benefit from it? Like as most of you may have already know I have a air arms prosport and an RWS 54. Now John Thomas already lapped and polish my 54 and she shoots amazing. My prosport is untuned and she is what is supposedly one of the best airguns off the assembly line. She shoots amazingly at whatever distances which really equates to 55 yards. But I'm always striving for that little bit tighter group as we all have and or doing. So my question to you guys are do you think it will benefit from a lap and polish? Or should I just leave well enough alone? Another question. What makes it the deciding factor to lap and polish apparel and how would you guys do it on a fixed Barrel rifle. Now I'm not going to do it on my Pro Sport but just in case if I get bored one day, LOL.
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I tinker with everything I own, from my cars to my house to my airguns to my fishing rods-n-reels to my power and hand tools to my computers. It's a matter of knowing that everything that is mass-produced can be made better with some attention to detail.
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I do it to every barrel that goes through my hands. It has only ever improved things or left them the same, never has it made a barrel worse.
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Lapping and polishing may indeed give you a further improvement in the way your gun shoots. If you're pretty happy already the crown is probably good.
If you opt to try fire lapping you can leave the gun together. If instead you opt for hand lapping a fixed barrel you will need to tear the gun down. Instructions for both methods can be found in the GTA Library.
A third method, which is not mentioned, is cutting a tight fitting patch and putting the compound onto the patch. This is then pulled through the barrel numerous times as though you were cleaning it. I mostly use this method on my powder burners.
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A third method, which is not mentioned, is cutting a tight fitting patch and putting the compound onto the patch. This is then pulled through the barrel numerous times as though you were cleaning it. I mostly use this method on my powder burners.
Which Paste Microne have I select for polishing Kral Puncher .177 barrel ?
http://www.ebay.com/itm/Diamond-Polishing-Lapping-Paste-Compound-Syringes-0-5-40-Micron-lj-/172764724760?var=&hash=item2839947e18:m:mnXjs8jTPmz6YkyoBXCs9jw (http://www.ebay.com/itm/Diamond-Polishing-Lapping-Paste-Compound-Syringes-0-5-40-Micron-lj-/172764724760?var=&hash=item2839947e18:m:mnXjs8jTPmz6YkyoBXCs9jw)
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You want an abrasive that is friable and non-embedding. I was able to find examples of diamond abrasives that are and those that aren't, but no distinction is made in the ebay listing.
Is there a reason you can't use or don't want to use J-B?
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A third method, which is not mentioned, is cutting a tight fitting patch and putting the compound onto the patch. This is then pulled through the barrel numerous times as though you were cleaning it. I mostly use this method on my powder burners.
Which Paste Microne have I select for polishing Kral Puncher .177 barrel ?
http://www.ebay.com/itm/Diamond-Polishing-Lapping-Paste-Compound-Syringes-0-5-40-Micron-lj-/172764724760?var=&hash=item2839947e18:m:mnXjs8jTPmz6YkyoBXCs9jw (http://www.ebay.com/itm/Diamond-Polishing-Lapping-Paste-Compound-Syringes-0-5-40-Micron-lj-/172764724760?var=&hash=item2839947e18:m:mnXjs8jTPmz6YkyoBXCs9jw)
what grit is supposed to be used in note lapping/polishing?
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I wouldn't use anything more than JB bore paste. It is designd for the job. Keep in mind these air guns use may use steel that is softer than powder burners.
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You want an abrasive that is friable and non-embedding. I was able to find examples of diamond abrasives that are and those that aren't, but no distinction is made in the ebay listing.
Is there a reason you can't use or don't want to use J-B?
Just not too high price ( max 20 Euro) with shipping to EU.
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Okay, in that case look for rottenstone. It's the name of the actual material, not a brand or product name, and it should be available most anywhere.
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Next will be OK ?
http://www.ebay.com/itm/Rottenstone-Fine-Abrasive-Powder-For-Shellac-French-Polishing-250g-/170942397218?epid=1288367985&hash=item27ccf5fb22:g:kagAAOSw9r1WBSps (http://www.ebay.com/itm/Rottenstone-Fine-Abrasive-Powder-For-Shellac-French-Polishing-250g-/170942397218?epid=1288367985&hash=item27ccf5fb22:g:kagAAOSw9r1WBSps)
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Yes, that's it! That's enough to last a lifetime for a casual gunsmith so if you can find a smaller qty, that would be fine.