Accuracy and distance from lands.

Farlsincharge

Farlsincharge

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Starting development for my .243. Using Berger 95gr vlds. COAL touching the lands is 2.900. In order to feed out of the mag I have to reduce it to 2.820. Is it worth it to start development or should I just go ahead and choose another bullet. Basically is 80/1000 too far from the lands for accuracy, I know this gun is capable of at least .5moa and that is what we are working towards here.

And........go.
 
You have to shoot first and see. No one person can sit here and say what will and what won't work for your rifle. Secondly, the Berger VLD's have shown that they perform very well at a larger than normal jump. Have a look at the Berger website and that will inform you further of what I am talking about. Go to bergerbullets.com, then go to information, then tech info. Scroll down the page to the VLD part and it will go into good detail.
 
I load 190 grn Bergers in my 300 Win Mag. In order to use the mag I have to seat them well well back from the lands. Still the rifle shoots .5 to .7 MOA.

Also use 190 grn Sierra HPBT which are closer to lands, still shoots.

Tried single feeding with Bergers, 10 thousand from lands, didn't change group size.

Stuck with the use of the mag and seat them back.
 
Getting the Best Precision and Accuracy from VLD bullets in Your Rifle

Solution

The following has been verified by numerous shooters in many rifles using bullets of different calibers and weights. It is consistent for all VLD bullets. What has been discovered is that VLD bullets shoot best when loaded to a COAL that puts the bullet in a “sweet spot”. This sweet spot is a band .030 to .040 wide and is located anywhere between jamming the bullets into the lands and .150 jump off the lands.

Note: When discussing jam and jump I am referring to the distance from the area of the bearing surface that engages the rifling and the rifling itself. There are many products that allow you to measure these critical dimensions. Some are better than others. I won’t be going into the methods of measuring jam and jump. If you are not familiar with this aspect of reloading it is critically important that you understand this concept before you attempt this test.

Many reloaders feel (and I tend to agree) that meaningful COAL adjustments are .002 to .005. Every once in a while I might adjust the COAL by .010 but this seems like I am moving the bullet the length of a football field. The only way a shooter will be able to benefit from this situation is to let go of this opinion that more than .010 change is too much (me included).

Trying to find the COAL that puts you in the sweet spot by moving .002 to .010 will take so long the barrel may be worn out by the time you sort it out if you don’t give up first. Since the sweet spot is .030 to .040 wide we recommend that you conduct the following test to find your rifles VLD sweet spot.

Load 24 rounds at the following COAL if you are a target competition shooter who does not worry about jamming a bullet:
1. .010 into (touching) the lands (jam) 6 rounds
2. .040 off the lands (jump) 6 rounds
3. .080 off the lands (jump) 6 rounds
4. .120 off the lands (jump) 6 rounds

Load 24 rounds at the following COAL if you are a hunter (pulling a bullet out of the case with your rifling while in the field can be a hunt ending event which must be avoided) or a competition shooter who worries about pulling a bullet during a match:
1. .010 off the lands (jump) 6 rounds
2. .050 off the lands (jump) 6 rounds
3. .090 off the lands (jump) 6 rounds
4. .130 off the lands (jump) 6 rounds

Shoot 2 (separate) 3 shot groups in fair conditions to see how they group. The remarkable reality of this test is that one of these 4 COALs will outperform the other three by a considerable margin. Once you know which one of these 4 COAL shoots best then you can tweak the COAL +/- .002 or .005. Taking the time to set this test up will pay off when you find that your rifle is capable of shooting the VLD bullets very well (even at 100 yards).

Regards,
Eric Stecker
Master Bulletsmith


http://www.longrangehunting.com/for...accuracy-berger-vld-bullets-your-rifle-40204/
 
RojamB21 said:
Why _______ ? I cut my 6mm-284 to my mag length as they are seated way out
Click to expand...

So what do you do? If I understand correct you seat the bullet so the ogive is lets say .010" off the lands but now the loaded cartridge is too long for the mag. So to fit the cartridge in the mag you cut of the tip of the bullet to shorten the cartridge but keep the ogive near the lands. Can you post a picture of a loaded 6-284 cartridge?
 
Since then I'm trying to post pics but I'm not computer guy and the link above is CUT , PASTE , QUOTE , Mixed up . And all I reload is rifle and small centrefire bullets only ,

It's possible to cut the tips equal length or you need micro seating dies that are coming to market these days.

I even cut the tips of 165 gr Ballistic Tips ( green tips) since they don't fit in 300 WM Browning 's Mag and shoots deer and moose both with them , Because the 78gr H4831 was getting compressed and its longer bullets

Yap , you understood right.

SO IT"S POSSIBLE OR PLAUSIBLE
 
So let me get this straight.....

You physically cut the tips off which alters your bullets weight and aerodynamics to fit your magazine?

This is a sad case of "you get what you pay for" with internet advice.
 
cdnredneck_t3 said:
So what do you do? If I understand correct you seat the bullet so the ogive is lets say .010" off the lands but now the loaded cartridge is too long for the mag. So to fit the cartridge in the mag you cut of the tip of the bullet to shorten the cartridge but keep the ogive near the lands. Can you post a picture of a loaded 6-284 cartridge?
Click to expand...

Don't you think that by cutting the tips of the bullet that your going to affect the B.C of the bullet. Which could affect the POI downrange...???

You doing something to try and give you greater accuracy but defeating that by butchering your bullets.....???

IF your that worried about being close to the lands buy a follower and load your rifle single shot...after all when it comes to hunting the first shot is always the best shot and SHOULD be the ONLY shot if the shooter does his job.:rolleyes:

OR just buy a Ruger #1, one of the greatest hunting rifles out there.
 
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