Knurled bbt 51g

[KnifeMaker]

I have found that a good polishing of the bore, and using 10wt silicone oil helped to a great degree.

Before the polishing, I was getting nor more than 35-40 shots before accuracy fill off in the .257 and often 25 was the last of shots before I noticed a fall off. And it was a 'Rapid" fall that would hit all at once.

Now, this fall off in accuracy is in the 150 to 200 shot + realm.

I will be happy to give my method if interested hire on the forum.

Knife 

[oneshot61]

By all means, please do. Anything I can learn I'm open to and grateful for. I want to be ready and give these knurled a fair shake.
Edit: I last cleaned mine with goo gone, then jb non - embedding bore paste and finished off with mothers mag wheel polish. Immediately saw a drastic difference. I lube with slick 50 one lube, but I am open to learning a better way or one that last longer. I do seem to have better results lubing my bullets/pellets.

[KnifeMaker]

I will try to post it tomorrow. I tried 1 shot, and it did very well for pellets, but not bullets.

It is a lengthy read. If I cannot get it done, I will post my home #, as it is a process that needs to be done correctly. Don't know if I can get it written with the right nuance as it is a delicate procedure that I developed myself. I'm very annal on accuracy.  . 

Knife 

[customcutter]

Here's a video I saw a few weeks ago on lapping a barrel.  Looked like a great tutorial, and I think the author had some National titles to back up his techniques.  IIRC.

[oneshot61]

Thank you Mr. Michael and thank you Mr. .Ken. I'm getting about the 150-200 shots or so it seems. I didn't chk the count, but I will. I am just not sure how often I should use the jb non embedding bore paste and mothers mag polish. I haven't heard of any issues with goo gone from anyone so far. I've heard that you can go to far with lapping, so at this point I may let someone with experience do mine. I need a definitive method and material for regular cleaning. I'll do a quick clean with goo gone and dry patches when I get back home this weekend before I test these bbt.
Mr Ken.... I think the video is missing 😃

[customcutter]

Sorry about that.  That's what happens when you're up past your bed time for several nights in a row.



One of the many projects on my to do list.  After I finish a couple of bull pup stocks and LDC's.

[Bill G]

so good to see you here Bill!

I have a few checkering files, that i have a strong feeling will do an excellent job! They have very sharp points, rather than the typical lines a normal file has. So one pass will do away with a need to do the norman opposing angle pass. (I Think) LOL!!!

Knife

Yes! Never crossed my mind doing but checker Ingraham files would be easier to manage I think. Let us know.

[oneshot61]

Definitely, please post here and let us know. I'm inspired to find a set on my way home to also try. It's a real pain trying to get that crosshatch with regular files, ( I tried 🙄) and not sure that is consistent from one to the next.

[oneshot61]

Had a chance to talk with Michael (knifemaker) today. Very nice guy! Gave me a lot of good information and really enjoyed talking air guns with him. Great guys here on the GTA!!

I had a chance to run down and shoot a couple of targets this evening. Knurled and un-knurled at 100 yards. I will say, that I am pushing the limits of this bullet with my barrel twist, which is 1-18.  I think someone with a faster twist will have better results. The difference is not astounding but noticeable. I don't normally shoot at 100 yards, especially with my .25 but thought it would be a great challenge for the 100 yard challenge here on GTA. My final thoughts? I think if you are wanting to tighten the group for a particular bullet, its worth the try. The comment that bullets should be sized to the thousandth of an inch is spot on. But, this is a very cool way  tighten the groups if it is not exactly spot on. I tried lite knurling, knurling only the back band and knurling the back band as well as the rear portion of the nose as the file rested on that part naturally. I got the best results on knurling both the nose and band with and aggressive knurling. Ymmv. So anyone trying this, please post your results. I'd love to see them. (there are two bullets in one hole on the top of the knurled target picture) That group is 1.1 inches.

[rsterne]

Daniel, if you get a chance, please post these results on the NOE Forum.... http://noebulletmolds.com/smf/index.php/board,24.0.html

Great work !!!

Bob

[oneshot61]

Thank you Mr. Bob! I sure will. I would love to see some others give it a go and post. There are some awesome shooters here.

[KnifeMaker]

I enjoyed talking to you as well.

It would seem that there is merit in the process, and certainly warrants further experimentation. 

I do feel that trying true metal checkering files would add a mucn deeper and more uniform pattern to the bullets, with nothing more than rolling the bullets between one and a hard flat surface.
Checkering files, are sadly, Expensive!!! Mine are all Swiss manufactured,and very expensive. But they cut steel like butter. 
After all, they had to be able to cut Aerospace Turbine steel for a living. LOL (This is what "all" My knives were made from).

Thank you for bringing this possibility to the attention of the AG Bullet Shooting fraternity Sir!!!

Knife

[Hobbyman2007]

Very informative ,thanks . I'm returning from work on Wednesday and should be able to put some lead down range  hopefully before the next weekend. I'll try to get some pics up if the results aren't too disappointing.