Getting the VLDs to shoot in your rifle

E

Eric Stecker

New member
There has been some exciting discoveries made by those who struggled with VLD bullets seated into the lands. Attached is a write up detailing the back ground and solution. If you are finding success with VLDs jammed into the lands then this information will fix something that is not broken so don't worry about it.

This write up will soon be available on our website blog.

Regards,
Eric
 

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  • VLD - Making it Shoot.doc
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Eric,

Good article, kudo's to y'all.

I'm shooting VLD's with as much as .040 jump, counter to conventional wisdom. I found my situation to be EXACTLY as you described and I do now test from .150 "out" to .070 "into" the lands. Two barrels shoot remarkably better at .040 jump. Only 1 out of 8 am I still shooting jammed.

This methodology has been much more satisfactory than my previous "go-to" of a deep jam...I used to spend a lot of time fiddling around at .002 and .005 and "just touching" to "square"....just like a PPC. I generally now fiddle with increments of ten thousandths with VLDs...

Also let it be noted that some of the 1K guys right here HAVE BEEN SAYING THE SAME THING for 15yrs! "Don't be afraid to jump" has been a common refrain....... it's just that guys like ME wouldn't lissen!

This has caused me to rethink the freebore depths on my reamers of late....

Thanks Eric...

al
 
eric,
good timming on the data.....
could you send me a couple of 190's and 210's...so i can make up some dummy 300win mag rounds for my 1000 yd project.
pm or email me....
thanks
mike in co
 
Eric,

Thanks for the info.

I've noticed that VLD's generally shoot well in custom bbls if tuned by seating depth...I've been running just touching to .008 jammed. Its been my observation that VLD's can be more temperamental in factory guns. I've had much better luck with the boat tails in factory guns in loads I've developed.

I was assuming chamber freebore to throat geometry/angles played a part?

Thanks

Ben
 
Ben,

I've always felt that for a VLD to shoot it must have MINIMAL neck clearance because excess clearance results in inbore yaw... (I may be all wet here, but decreasing neck clearance has been one of my "secrets" to getting VLD's to shoot) This of course precludes factory chambers.

Conversely, using the close tolerance does maintain a close guiding means for jumping.....

And as per "playing around with .002 and .005 and "just touching" to "square"....just like a PPC." ......... UNlike the typical blunt PPC bullet, I've found that VLD's will take up to .070 of jam! (My personal record) Whereas the 65-70gr 6mm bullets will normally be pushed back before you achieve even as much as .005 jam.

Of course I haven't played much with the newer long-ogive PPC bullets.

al
 
Alinwa

Al
If you make it out for the 600 Yard Nationals in April or the 1,000 Yard Nationals in October I'll show you how to jam them 0.125 into the lands.
Lynn
 
Al, have you had a chance to test jumping 6mm 105vld's in a 6br or similar? I've always started testing at .015-.020 in but i'm begining to wonder...chris
 
Bnhpr said:
Eric,

I was assuming chamber freebore to throat geometry/angles played a part?

Thanks
Ben
Click to expand...

Ben,

I can confirm at this point that those who have tried the 4 COAL find one of the COAL shoots better than the other 3. This has been done in both factory and match barrels. The results are remarkably consistent in that a sweet spot is found (which sometimes is a jam). It is also consistent that this sweet spot is in different places for different rifles.

There has not been enough reports detailing specific chamber and throat dimensions to suggest how these things play a role in this result. It is possible that the sweet spot may move in or out based on chamber or throat dimensions but to say how or in which direction the sweet spot moves would be pure speculation.

Mike,

PM sent.

Regards,
Eric
 
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Ok, It's making more sense now. I have been discriminating against VLD's in 308's with magazines, but in all fairness, I've never tested them sufficiently jumped a large distance. I recently chambered a tigh neck .308, and then went right in to jam. Looks like it will shoot in the 2's, without tuning.

I build a rifle around a bullet, so I built a 257 roberts on a long action 700 (hunting rifle), so I could get a jam with VLD's, and magazine feed.

Great bullets.....glad to see them showing up in new calibers.

Ben
 
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