Nosler Knurling
 

Well today was suppose to be a shooting day! It has been really nice the last couple of days the snow here at the house was completely gone and I was really hoping that I could get into the rock pit for some shooting...


Mother nature - had a big hick-up planned! It rained during the very early morning which was not a problem at all - there was even a bit of sun this morning about 8 am. Things were looking really good. THEN





So I changed missions! This last Knight Super DISC that I got has the largest bore of the 3 Super DISC's that I have. I am really interested in shooting full bore projectiles from the rifle. I have some .4515 Sierra 3 grain bullets, tried them in the bore and they slid right to the bottom of the bore. Next bullet up was a Lehigh/Knight .452x250 Bloodline. The bullet would start in the bore very easily but the factory knurling would not pass through the crown without pressure - so this bullet could be a real possibility! Next I tried some Nosler .451x250 gr. HP's. They would also drop to the bottom of the bore. They should be a really good candidate for knurling and shooting'


I then spent some time knurling up 10 of the Noslers. I also pulled out 10 Bloodlines put the bullets together with the Noslers and a bunch of shot cards for my next shooting trip. I am really hoping to have a really fun shooting trip when ever that might be....


I also have some Lehigh 45 cal. full bore bullets that Dave ran a few years back. I pushed them through a .452 sizing die and will try them also





Here are a few pics of the project...

Mike I have a question, I have heard of people ruining barrels by shooting bullets they had knurled with a file and they seem to think that the cutting edges of the file had embedded in the bullet when they broke off the file; do you have any information about this?

I do believe that could happen! But I am using what I think are a little better quality case harden file and I have moved to the more aggressive 'General Purpose' file with large double cut teeth which is less susceptible to breakage even using it for filing very hard metal.

I have also read the thoughts of teeth possible breaking off and have inspected the files several times for that possibility. One thing that could lead to the teeth breaking is if the files are rubbed against each while knurling or if the files were stored loose against each other. Keep the files away from each other

Also you can see in the picture I do use a leather pad under the bottom file for a cushioning effect.


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Another thought I have is the metal that I am knurling is not that hard and the knurling really does not go deep. Even the brass bullets I am knurling accept the knurling to a certain point.


Lee, at this point I have not seen any indication that file breakage might be occurring.

I looked at mine very carefully and with a large magnifying glass and did not find any sign of cutting teeth missing. I can see what would happened if someone got a bit careless and let the files hit each other. Thank you LEE

Use a quality made single cut file and your chances of a broken tooth are remote.

Scotty, I am wondering why you prefer the single cut? I used them for awhile but really prefer the 'X" pattern the double cuts leave. Seems like I get a much better more reliable grip on the lands. And people would be surprised at how light they load and still have great accuracy.

Its not a preference, its just less likely to leave anything on the bullet.

Good enough