Meplat trimming & bullet tipping?

Discussion in 'Reloading' started by joseph, Apr 9, 2011.

  1. joseph

    joseph Well-Known Member

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  2. Gene

    Gene Well-Known Member

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    The very limited benefit of meplat trimming is of little consequence for hunting bullets. I shoot long range competition and often trim VLD meplats. Doing this will result in slight loss of BC. I have seen no improvement in accuracy. I do not yet point bullets. Guys who do point bullets tell me they can see very little difference. I am reluctant to keep spending $$ on gadgets that are not effective. You need to decide.
     

  3. joseph

    joseph Well-Known Member

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    Thanks Gene,

    I didn't think it would make a hill of beans for increasing accuracy. And it is BIG BUCKS to do both.

    joseph
     
  4. Mikecr

    Mikecr Well-Known Member

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    Always amazing to read generalizations about hunting needs, as though LESS than for competition....

    Hunting, espescially when it involves long range shooting, demands far more attention to details to be successful. Hunting shots require REAL accuracy,, without sighters, foulers, barrel temp stabilization, wind flags, benches, benchrests, stools, and with guns that can be carried & fired from any condition required to meet the challenge -at any abstract range.
    ONE SHOT

    Now, what anyone competing and actually representing competition should be aware of, is that the devil in LR shooting is WIND DRIFT VARIANCE.
    This is the ultimate variable in long range shooting, and it's what provides potential in bullet uniforming.

    Meplats have a large affect on BC, which has a large affect on wind drift. Shooters cannot consistently account for wind drift, so reducing every variable possible(other than actual wind) is a worthy endeavor. It can extend your single shot accuracy range, regardless of what competitors think about it...
     
  5. elkaholic

    elkaholic Well-Known Member

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    For long range hunting, bullet tipping can make a significant difference, depending on which bullet you are tipping of course. Benefits are higher b.c. , better, and more consistent, expansion at lower velocities (long range). As far as accuracy goes there probably isn't much difference providing you have uniformity. Having said that, it is easier to hit a long range target with a higher b.c. bullet........Rich
     
  6. lazylabs

    lazylabs Well-Known Member

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    The bullets I have seen trimmed and tipped seem to finish looking like a FMJ. Has anyone tested SMK bullets for before and after expansion? I realize these bullets don't have a huge hollow point to start but virtually none after.
     
  7. elkaholic

    elkaholic Well-Known Member

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    You can enhance the expansion of an SMK by drilling the tip out 1/2 the meplat diameter and filling the void with silicone......Rich
     
  8. joseph

    joseph Well-Known Member

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    The reason I started this thread is because I have shot 5 shot groups at 400 yds as small as 1.5" and 1.75" but not consistent, but my average the other day was larger. I shot five 5 shot groups which measures 2.0", 2.375", 2.375" 2.25" and another one that was 1" for four shots and one flier which gave the group a total measurement of 2.25".

    I was hoping that if I did trim the meplat and tipped the bullets I could get more consistent groups down under 2 inches. For me that is a lot of $$$ if it probably won't help.

    What do you think?

    joseph

    PS: I am shooting a 6mm Norma BR. with 105 gr. Berger VLDs, CCI BR4s and Varget just touching the lands.
     
    Last edited: Apr 10, 2011
  9. CRNA

    CRNA Well-Known Member

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    How do you do that and keep them all the same? How deep do you drill them out? Interesting since SMKs are what I shoot.
     
  10. elkaholic

    elkaholic Well-Known Member

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    You need some kind of vice to hold the bullet consistently without deforming it. Drill just through the jacket and not into the lead. You will have to experiment to get the depth right. Once you do, drill to the same depth each time. Fill the void to the tip with silicone. The weight should not be much different than before drilling. If the bullet still doesn't expand to your liking, use a slightly larger bit size. The idea is to thin the jacket nose and the silicone will start the expansion of the tip as well as replace the weight and smooth things up a bit......Rich
     
    Last edited: Apr 10, 2011
  11. CRNA

    CRNA Well-Known Member

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    Thanks!
     
  12. Gene

    Gene Well-Known Member

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  13. elkaholic

    elkaholic Well-Known Member

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    VERY good read! I found this to be true when I tested some of my bullets WITH and WITHOUT, ballistic tips. They were 195 grain .308 8s spitzers. The original meplat was as tight as I could squeeze down my dies. I didn't measure the meplat at the time (wish I would have) but it was considerable, probably over .100"? I then added a sharp pointed tip and fired away at 950 yds. The difference in group height was over 20"! Made a believer out of me:D.......Rich
     
  14. Boss Hoss

    Boss Hoss Well-Known Member

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    I have shot more 142 SMK’s than Brian Lutz will ever shoot and for the most part I agree with what he said. The point up die I use (Speedy built it) is more effective that just trimming the Meplat in my experience. Vertical is BAD for 1K BR shooters and I prep my bullets for sporters the same way IF they are going to be used primarily at 500 yards or more. Just like sorting bullets by bearing surface for sporters---I like to use the same process every time because the sporters are built the same way and the same person who builds my competition rifles. I makes sense that if my reamer cut the chambers for both the sporter and competition rifle and the dies were also made with the same reamers then there will be very little variable in my loading process which is a good thing.

    The biggest benefactor in trimming Meplats that I personally have found is the big 338 SMK’s. In my 338 Slowpoke it made a 4-5 inch difference in vertical ---- I only take off the very Minimum necessary because as Brian discussed BC is important. THE MOST important thing is consistency in your process which includes ammo to bag manners so that the end item product will be the same every time---a hit, albeit an x ring or a prairie dog LOL!!