Pull marks and pulled bullets

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Slamfire

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I am loading batches of 270 Win ammunition to shoot in my recently rebarreled pre 64 M70 and setting up the OAL, I noticed that I had a bunch of bullets with deep pull marks. This morning I sorted these bullets in two groups, ones that have obviously deep pull marks or gouges, and not so deep marks. I was going to divide the piles into a good versus bad, but it became obvious the bad pile was getting very big, and the good pile was staying very small. From there I loosened my criteria from perfect in the good pile, to "maybe this scratch mark is not too bad". These pulled bullets from RMR are the worst I have received to date, more deep gouges and scratches, than any I have ever purchased.

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Now the problem is, I don't know what scratch mark level is deleterious to accuracy. I am of the opinion that something that shifts the center of gravity of a bullet will create inaccuracy. Assuming the center of gravity was in the middle to start with, the further the center of gravity is from the axis of rotation, the more wobble a bullet will have as it rotates downrange. However, these are hunting bullets.

This is a 308 caliber bullet:

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I have shot enough of these Federal Fusion bullets to want to believe that the occasional flyer I get, is due to the bullet.

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However, 300 yards is a long way, I am shooting these in a Sporter rifle, this target was from a rifle that will basically shoot within 2 MOA, so it does not have to be the bullet. I would like it to be the bullet and exonerate myself from all blame, wouldn't we all?

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My 30-06's are shooting better than my 270's at this moment, and I have some excellent groups at 300 yards with the ever wonderful 168 SMK's

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The Federal Fusion pulled bullets, well, the group is clearly more loosey goosey, and the flyers could be me, I am not showing the "flyers" that were not pictured with match bullets, I would not want to destroy the illusion!

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I would not shoot pulled bullets in any target match, unless I was shooting standing, there, my hold is such, I am not going to see inaccuracy due to the bullet. But given that, the accuracy of these bullets is reasonably good out to 300 yards. That is, if the shooter will accept a CEP equal to a pie pan, and not try for one of those fabled 700, 800, 900, 1000 yard shots so commonly claimed on the web. You know, two miles is getting to be the old 1000 yards in terms of bragging. I wonder when everyone will be bragging about their 5 mile shots on deer and antelope. :barf: I am going to load up some 270 Win loads exclusively with the "bad" bullets, and see how they do. However, I am considering rebedding the test rifle. The front lug was bedded, the rear lug was not.

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After spending days inletting the stock for the new barrel, I was a bit lazy and did not route out all the old bedding. I also did not pour epoxy under the barrel shank, but the first tests at the range, prone with a sling, were very promising, but the second tests, on the bench, were more in the category of disappointing, so, time will tell.

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Whenever I have gone whole hog in bedding a M70, and the pictures of the afore mentioned pre WW2 M70 in 30-06 were whole hog, I "pillar" bedded the action,

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Routed an ungodly amount of wood around the action sides, and the "front pillars", trying to have at least a 1/4" thick layer of epoxy when done

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Free floated the barrel
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and left a good layer of epoxy under the chamber. And to date, those rifles have shot well. I did the whole hog bedding on this rifle:

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and it shoots very well, for a light weight sporter.

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as long as I don't shoot Core Lokt's

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Shoot a control group and find out. You're the only one who can actually say what they'll do in your rifle, with your load.

I have a 5 shot 200 yard target that I shot with some pulled bullets to warm up the barrel one morning, and when I measured it, it was 5/8" center to center. I had considered them junk bullets and relegated them to warming the barrel loads, but they soon became my favorite load for my .223 Varminter. I had about 200 of them I had pulled down, and was sorry to run out of them, but the ground squirrels weren't.....

Hope this helps.

Fred
 
I pulled about 250 Win 224 fmjbt bullet with channel locks. All deformities were above the crimp groove , towards the nose.

At 100 yards, no difference in accuracy when compared to virgin bullets from the same 5000 lot. But these bullets were not made for accuracy. They complied to military accuracy standards.
 
Talladega CMP is a beautiful range. The wife and I visited just to look around, never shot there.

Have a blessed day,

Leon
 
I agree with Reloader Fred. Try some of the bad ones as you have more and work up a load. Then try that load with the good ones. If shooting 200 YDS or less I bet you can't measure the difference.
 
The pull marks shown don't look all that bad. Worse will be done to them once they engage the rifling under pressure. All you can do for your peace of mind is test them - or sell them I suppose.
 
Slamfire wrote:
I am of the opinion that something that shifts the center of gravity of a bullet will create inaccuracy.

Let me first say that I am very impressed with how cleanly you sectioned the bullet.

I agree that anything that shifts the center of gravity will affect the trajectory when compared with bullets whose center of gravity has not been shifted.

The pull marks themselves create disturbances in the airflow around the bullet in flight that may result in movement of the bullet around the direction of travel that will increase in magnitude the longer the flight lasts (i.e. the greater the distance to the target).

I have not observed pull marks such as those shown in the photographs causing a significant impact on accuracy (or precision), but most of my shooting is done around 100 yards where the effects of weight shift and aerodynamic disturbance would be a tiny fraction of what you would see at 300 yards.
 
Many years ago, when money was VERY tight, I dfouldn't afford "them thar purty bullets" from speer, Sierra, etc.

I bought 2,000 pulled 162 grain black tip, .30 cal M2-AP bullets. They didn't shoot MOA, but in my M-1, they shot better than I could hold offhand, kneeling or sitting.
 
Thanks for the replies, I have loaded up 50 with nasty pull marks, and 50 nice pull marks, and am continuing to load up more. First 100 was with WC852, going to load some H4350 loads just to compare powders. I am also going to load some more 130 Fed Fusion pulled, with H4350 or AA4350, and cut the loads to see what that does for accuracy.

Load a bunch, then, have to size, trim, prime a bunch!. Takes forever.....

Been busy on some other things, but I have a bunch of Nosler partition 150 grain pulled that I need to get to. Then I have 6.5 mm pulled, and some 257 Roberts pulled. Christmas shopping is taking away from my reloading!

Years ago I bought 1000 174 308 FMJ that had nasty pull marks. I tumbled the things, and that was a mistake. If you tumble bullets long enough, the pull marks get smoothed out, but those bullets never shot well and were only good for adjusting a newly installed scope on paper, before using good bullets to establish a zero. I think I busted a lot of rocks with the things.
 
I agree that anything that shifts the center of gravity will affect the trajectory when compared with bullets whose center of gravity has not been shifted.
Which is why they use the most concentric jackets to make match bullets with.
 
Years ago I bought 1000 174 308 FMJ that had nasty pull marks. I tumbled the things, and that was a mistake. If you tumble bullets long enough, the pull marks get smoothed out, but those bullets never shot well
I wonder if the tumbling had an affect or they were simply bad bullets.

I have 500 "air pulled" 175 Gr Sierra MKs, but have never tried them. Haven't tried to box of brand new ones either. I decided my FN-SPR was a 600 yard rifle for my purposes and quit worrying about 175s.
 
I wonder if the tumbling had an affect or they were simply bad bullets.

Don't know, just remember my impressions. I have shot tens of thousands of pulled 174 FMJ, still have ammunition boxes filled with 174 FMJBT bullets pulled to make "Mexican Match", and those bullets shoot fine. Shoot fine for military bullets, I used to shoot them out to 300 yards with a Garand or M1a, but I don't recommend them at 600 yards. The eights that happen, and happen enough, just cause too much mental anxiety.

I have 500 "air pulled" 175 Gr Sierra MKs, but have never tried them. Haven't tried to box of brand new ones either. I decided my FN-SPR was a 600 yard rifle for my purposes and quit worrying about 175s.

I have an ammo can of those, have not shot them. The 175 SMK is a great 600 yard bullet, and shoot well out to 1000 yards.
 
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