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Knurling
Jun 28, 2016 17:25:33 GMT -5
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Post by doug136 on Jun 28, 2016 17:25:33 GMT -5
What all does knurling a bullet do ? I realize that it will increase the diameter of a bullet but does it also weaken the jacket ? Will it effect the bullet at long range ?
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Post by Richard on Jun 28, 2016 19:37:52 GMT -5
No and No! You are barely scratching the surface of the bullet so I see no way it will weaken it! And long range accuracy? My longest range I can shoot is 300 yards and I see no effect on accuracy. Sometimes what happens (at least it has for me?) is you size a bullet and the setting of your die makes it too loose so you do a light knurling just to get the fit right. Jackets on most ML bullets start at around .015" thick (Parker BE's) and run up over .030". I have taken .452 Hornady's up to .456" knurling between two mill bastard files so that is hardly taking any strength away from those jackets.
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Knurling
Jun 28, 2016 19:55:04 GMT -5
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Post by doug136 on Jun 28, 2016 19:55:04 GMT -5
No and no lol ok ok ! I didn't know I thought maybe it weakened the jacket to help the bullet fatten . But as usual I was all wet ! Why then do some guys smooth form Thier bullets to small then knurl them back up ? Thanks Richard I appreciate your wisdom !
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Knurling
Jun 28, 2016 19:56:40 GMT -5
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Post by doug136 on Jun 28, 2016 19:56:40 GMT -5
Is that by accident or on purpose ?
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Post by schunter on Jun 28, 2016 20:06:44 GMT -5
It's usually by accident but I have seen some guys do it on purpose.
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Knurling
Jun 28, 2016 23:58:35 GMT -5
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Post by Deleted on Jun 28, 2016 23:58:35 GMT -5
I like doing it because I find myself having to much spring back on bullet. When that happens I can't get the bullet to load while I'm in the field hunting. If i size then smaller and don't knurl them back up I feel like the bullet won't stay on the charge and jump off causing ignition issues or accuracy issues. If I size small and knurl up it creates enough friction to hold bullet on charge and better ignition. I've seen better accuracy this way as well. Hope that helps.
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Knurling
Jun 29, 2016 8:28:14 GMT -5
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Post by doug136 on Jun 29, 2016 8:28:14 GMT -5
Ya that does help and makes sense . I have never shot full bore bullets until now . Always hunted with Barnes and sabots . So yes that really does make sense. I was actually hoping you guys were gonna tell me it helped the bullet grab the rifling more . I'm sorry guys I will be asking a lot of stupid questions . I'm really getting into this sport . I don't do any thing half a$$ed and very particular with my equipment and accuracy . So my goal is to be the best I can . So another words my stupid questions are gonna keep coming .Thank you for all the replies and help !
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Post by GMB54-120 on Jun 29, 2016 9:57:57 GMT -5
If i knurl mine too much they just get a pass through a .451 or .452 Lee sizing die. I do this intentionally sometimes too. Its extra work but i never get any surprises at the range that way.
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Post by keith on Jun 29, 2016 10:07:15 GMT -5
I've only had to knurl once and it was because I took some monos I had already sized that were too tight and annealed them just to test some stuff. Copper shrinks when annealed so they then fell down the bore. A slight knurl brought them back to 12# seating pressure and allowed them to be shot smooth form with good results.
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Post by Richard on Jun 29, 2016 12:44:06 GMT -5
I have done the bit where I under sized and then knurled. Particularly with solid coppers or thick skinned jackets. If I have the bullet under sized and then knurl up, I only have to compress those little "tips" that knurling brings up? So I get a bullet with a good fit and somewhat cut into the rifling groves.
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Post by Deleted on Jun 29, 2016 17:15:27 GMT -5
Ya that does help and makes sense . I have never shot full bore bullets until now . Always hunted with Barnes and sabots . So yes that really does make sense. I was actually hoping you guys were gonna tell me it helped the bullet grab the rifling more . I'm sorry guys I will be asking a lot of stupid questions . I'm really getting into this sport . I don't do any thing half a$$ed and very particular with my equipment and accuracy . So my goal is to be the best I can . So another words my stupid questions are gonna keep coming .Thank you for all the replies and help ! I started out on Doug's asking a lot of questions and probably a lot of dumb ones as well. Still probably do and sometimes post useless info as well. Ask questions and don't worry if they are dumb or not at least you will know. A lot of these guys have gone through the same process as you are now. A lot of this is trail and error. To me there is nothing more frustrating and embarrassing than getting into the field with your buddy, (Zen) and not being able to load your bullet because it sprang back. Been there done that!! I know I had it sized right before I left home but I climbed 2000' in elevation and I blame the change for my mishap. So now I size loose and knurl up this way I don't have the same problem again. Don't be afraid to ask questions. I still do!!
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Knurling
Jun 29, 2016 20:31:43 GMT -5
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Post by doug136 on Jun 29, 2016 20:31:43 GMT -5
Why not knurl everything then Richard ? Also Jeff are you selling that knurling tool you had on one of your videos ?
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Post by Richard on Jun 29, 2016 20:57:49 GMT -5
Doug..........some bullet I just hit right all the time. I have a .4495" custom die that run Kyle's bullets thru (3) times and they have sat in my load box for months and will load perfectly every time! The Barnes TEZ's? Same thing! But I have had Hornady's that seemed to spring back somewhat. And, the fact that they like to shoot loose anyway, I tend to over size them a bit. If I think they are a tad too loose? I lightly run my file over them at the range. Any bullet I was going to hunt with, I would definitely make sure fit and in fact, would run them down my bore prior to the hunting trip. Sometimes just adding a veggie or wool wad to a loose bullet will do the trick. Good talking to you this evening!
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Knurling
Jun 29, 2016 20:58:24 GMT -5
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Post by bestill458 on Jun 29, 2016 20:58:24 GMT -5
Be cautious when knurling . Always use high quality files. Cheap files have been known to chip and a piece of a file embedded into a copper bullet would do a number on your rifling
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Knurling
Jun 29, 2016 21:46:31 GMT -5
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Post by doug136 on Jun 29, 2016 21:46:31 GMT -5
Richard you have probably forgot more than my simple mind can even absorb . Thanks for all the info . I'm sure I'm speaking for many if not most thanks for all the information you give us . Also thank you for all your range trips week in and week out . Pure dedication !
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