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Forum Index > Rifles general discussion > Lead Tip Bullets

Lead Tip Bullets

05 Mar 2015
@ 04:38 pm (GMT)

Thomas Pavelka



Here's one of the 30-06 Encore setup. Rather handy rifle it turned out to be.

For this musket I have decided to go with the Nosler Partitions as Nathan has suggested.

In my case, where shots are going to be in feet sometimes, and generally not more than 50 meters the following observations won't amount to a hill of beans.

But for the sake of understanding, and those who shoot across pastures, I find myself wondering what the damaged tips of boxed ammo do in the field.

It seems that commercial ammunition gets a bad go of it from the time it is made. The boxed ammo is thrown around in shipping, gets a shaky ride on airplanes, bounces around in the freight carrier's truck, and then lands on the counter of our sport shop where we at last get our crabcrackers on it.

Many of the lead tips on Nosler Partitions are somewhat flattened, some are a bit crooked. In a given box there is not much in the way of uniformity.

This makes me wonder just how much this can affect terminal performance. Obviously, the true sharp point will have a higher coefficient. But lets say that the tip of the next bullet is flattened out to .080 of an inch. How much does this do in the way of dropping the coefficient, and, it would seem this would also show a different POI due to this damage.

The second part of this sad tale is now we have a sharp pointed bullet entering game and it performs on cue in as far as expansion and penetration. But, the next round, now has a .080 metplat. Can we expect the same rate of expansion, or will it in fact "open" faster due to the flatter tip?

Assuming that one could get a box of all sharp pointed bullets, or, one gets them through careful reloading, the fact remains that cartridges get battered in magazines and general handling while going in and out of pockets.

Would not it make sense to put a carbonite tip on a Nosler Partition and completely eliminate this quirk?

Just wondering.

Replies

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05 Mar 2015
@ 10:59 pm (GMT)

Nathan Foster

Re: Lead Tip Bullets
Hi Thomas, I have not had problems with Partitions being beat up to the degree you mention and I often use them to 600 yards or so which is about the limit of the bullet design in a few of the magnums. They may lack the uniformity at the tip of a match bullet, but are generally so bad as to be problematic.

If you get a few bashed in the magazine, then yes, it can cause a need to flatten the tips right off and use these as bush woods loads as the BC and POI (but not so much accuracy) will be effected.

A polymer tip would have been OK for this design, many things could have been played with. But alas, the new kids had other ideas.

To be honest, if you are not shooting open country, swiping the tips off makes little difference to trajectory. You can check to be sure on paper at 100 yards.

There is no change in energy transfer. To effect change, the diameter at the tip of the copper jacket has to be altered. This is a constant. The actual lead tip is in itself so soft that it can be considered non existent.
06 Mar 2015
@ 08:18 am (GMT)

Mike Davis

Re: Lead Tip Bullets
my .270 is very hard on bullets in the magazine, used to be very bad back when we shot a lot of wallabies with her, the bottom 2 rounds may have 10 or 12 shots fired over them before they got used and would really get a hammering. ballistic tips in bottom two spaces of the mag fixed that.
PMC made cheap ammo back then, the projectiles looked huge as must have been not as dense as other brands (the 130s were bigger than most 150s) I would take tips off them with pair of snips clean as a whistle to top of cup giving a say 2-3mm flat tip. they didnt get mashed and worked fine. furtherest big game animal Ive shot was with one of those a mature chammy.1st shot aimed at top of shoulder clipped rock by her toes so Kentucky windage was applied and over she went.thats approx 3 feet of bullet drop (Ill let you work out the range)
06 Mar 2015
@ 04:31 pm (GMT)

Thomas Pavelka

Re: Lead Tip Bullets
Thanks for the response Nathan! I would think that someone of you stature and good standing would have a very receptive ear at Nosler in the design of a 21st Century Nosler Partition. It may just be the right time in the hunting arena to give birth to a modern Partition to suit the new and much improved rifles.
06 Mar 2015
@ 04:39 pm (GMT)

Thomas Pavelka

Re: Lead Tip Bullets
Mike

I have had some similar and strange results with a host of lever guns. One 35 Rem I had in a "Marlin Darlin" had a magazine spring so stiff it would move the bullets past the crimping groove. Not to mention that the round noses were now flat noses.

With freshly loaded Sierra 200 grain Pro Hunter bullets over Win748 Ball powder and a mag primer that rifle would rip one ragged hole off the bags at 100 meters if I single loaded them. But if I filled up the tube the groups went all over the landscape.
06 Mar 2015
@ 07:50 pm (GMT)

Nathan Foster

Re: Lead Tip Bullets
Receptive ear. No. More like a source of annoyance perhaps. But then I really do not know for sure. I have never had any contact with Nosler.

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