Cheap Ammo and Fliers


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Old 02-23-2011, 06:36 PM   #1
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Default Cheap Ammo and Fliers

There have been some tests done by one person as to fliers with cheap and even sometimes good, high priced match ammo and I though I'd pass it on.

One thing was found by shooting bullets into snow then recovering them using a metal detector.
It was found than many of the low priced bullets had voids or less than perfect bases on the bullets.
This void, when fired, lets the gas escape from the muzzle at the void first which causes the bullet to go approx 180 degrees from the direction of the void when it exits the bore.

For a bullet to fly streight, the edge of the bore must be perfect and the base of the bullet must also be perfect. Any variation in the bore being perfectly concentric and the base of the bullet being perfect is going to cause fliers.

Just picture a bullet with a small void (they almost look "V shaped).
The bullet is going to get pushed to the 180 degrees to the side from where the void is by the gasses escaping from that void before they escape from the rest of the base.
A bullet that is sent flying at an angle is not going to stabilize as well as bullets that have bases that are perfect. The end result is a flier.

Many of the recovered bullets that were the cheap big box type bullets did not have good bases on the bullets. Without a perfectly concentric base with zero voids, you will never shoot small groups because the bullets with any imperfection in the base are going to fly all over.

That is one of the reasons, but not the only reason cheap bullets may not group like higher priced bullets that have bullets made with more precision.

A perfect crown help a lot in accuracy, especially when you are shooting longer range. Factory crowns are good at best, some better than others.
It is for that reason I have had all my rifle barrels except collector rifles re crowned.
As a retired gunsmith, I have yet to see a rifle that does not shoot better groups with a properly re crowned barrel. By properly re crowned, I'm talking about a PTG cutter that cuts the crown all at once with a tight fitting pilot in the bore, cut between centers of a perfectly set up lathe and a perfectly indexed barrel, not one of the many hand, do it yourself, home muzzle cutters.

Some rifles shoot a veriety of bullets better than some other rifles which are very ammo sensitive. I can't prove it, but I believe it has something to do with the type of rifling the rifle has. There is a pattern to this. A for instance is the Savage, in the 22 LR, they seem to only shoot match ammo and then only some match ammo's well. There are exceptions, but I have seen this in a couple hundred of them.

Bottom line, when it comes to RF bullets, you get what you pay for.
The artical had many pictures of the bullets and the resulting flier in caused on the target. It was very good information and made perfect sense. The pictures of good base ammo VS ammo with bad bases proved the effect the base of a RF bullet has.

Just food for thought.

My Best, John K



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Old 02-23-2011, 07:09 PM   #2
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I once weighed a brick of Winchester Dynapoints and sorted them out by weight. The variation was about 1.2 gr. Groups did improve by shooting the same weight group but it was a lot of hassle. The different weight groups also shot to different points.
I recently bought a used 22 mag rifle. I tried Winchester Dynapoints, CCI Maximag and Remingtons. The CCI shot the best. The Rems werent too bad but the Winchesters groups were 2x the size of the Rems and 1 foot lower point of impact at 100yds.

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