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Optimizing Precision And Accuracy From VLD Bullets By Eric Stecker

 
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  #29  
Old 08-24-2011, 08:16 PM
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Re: Optimizing Precision And Accuracy From VLD Bullets By Eric Stecker

I also have a 300 ultra mag in Browning A Bolt, I have tried just about every bullet out there and most were just OK nothing to brag about. Last year I pulled the bullet out as far as the magazine would allow ( I actually ground the magazine down some with a small grinder) switched to the burger 168 gr. VLD and my MOA was really improved. I went from 5 shot groups of 2 inches at 100 yds. to 5 shot groups of 3/4 inch. Then I moved the bullet back a little more and finally its shooting closer to 1/2 inch groups. I found my sweet spot pretty quick (got lucky) I really think thats about as good as its going to get with the browning.
Good Luck on that sweet spot its there somewhere.
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  #30  
Old 01-21-2012, 03:10 AM
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Re: Optimizing Precision And Accuracy From VLD Bullets By Eric Stecker

Im a newbie to reloading and have a SIG SHR 970 in 30.06. I would like to try the Berger 168 vld hunting? 22" barrell with a 1:10 twist
Any data will help and wanna try them on game in South Africa.
Tx
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  #31  
Old 01-21-2012, 04:27 AM
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Re: Optimizing Precision And Accuracy From VLD Bullets By Eric Stecker

Excellent article! I have been shooting two 6.5x284 rifles, a Cooper and a Savage for a while and have used the 140 gr Berger Hunting VLD's. The throats on these rifle differ by .025", the Savage being longer. OAL for my load being approximately 3.010" for the Cooper.. Interestingly, the sweet spot is .075" from the lands plus or minus .010" for both rifles. Less than ..010 from the lands was producing pressure signs. Tested between .010 and .100". I used 59 gr of Retumbo, Fed 215 primer. Velocity runs between the two rifles is 2965 and 3015 FPS. Both rifles produce consistent .25-.5MOA, tested out to 500 yards. At the other depths ran .5-1MOA. At 100 yards. I have shot 11 deer and antelope from 200- 1000 yards, all except one broad side shots In the chest area. All broadside were 1" entrance 2-3" exit wounds with major internal damage and no animal moving more than 20 yards from impact, 9 dropping in there tracks. Never retrieved a bullet to see what they looked like. I really like these bullets!!!
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  #32  
Old 01-22-2012, 09:51 PM
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Re: Optimizing Precision And Accuracy From VLD Bullets By Eric Stecker

Nellie,
Welcome to LRH! Check with Bergers website (Berger_Bullets) as I think you can get load data/advise there.

Greyfox, I agree.

I saved this article to my desktop a while back and put it to use today. I too am shooting a Savage 6.5-284Norma but using the 130gn VLD Hunting. I tried several powders with all the bullets into the LaG's hoping to get lucky and find a good combo. Talk about frustrating!
I re-read this article and decided what the heck. I started out with a powder I have had great accuracy with in this rifle so far and that is AA3100 . A max load of 54.5gn had proven the most accurate previously at 2.5330". I watched groups slowly shrink the farther away the bullet got from the rifling. I stopped at 2.443" (.090" off) with a group of .379". So far this is the best the 130gn Bergers have grouped but I am going to try one more group @ 2.403 or .0130" off. Always hunting that elusive "one-holer". Now I'll have to go get more 130's and AA3100.
I love it when deer season ends and I can start reloading again (I wonder if that's considered a love/hate relationship?). JohnnyK.
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  #33  
Old 02-07-2012, 12:01 PM
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Re: Optimizing Precision And Accuracy From VLD Bullets By Eric Stecker

I have a question, probably a stupid one, haha. I am going to shoot VLDs out of my 7mm Rem Mag. I have both the 140s and the 168s. If I find the jump for the 140s, do I need to still find the jump for the 168s? Is the jump bullet specific, or rifle specific?

Very informative article.

Thanks.
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  #34  
Old 02-20-2012, 05:19 PM
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Re: Optimizing Precision And Accuracy From VLD Bullets By Eric Stecker

Nellie,

If you don't find what you are looking for on our website you can send an email directly to Walt Berger at bergerltd@aol.com. Give him your case and bullet details and he will provide you with load data. It is Min~Max data since we don't regard "accurate loads" as being genuine since each rifle is likely to shoot best with a load that is tuned for that rifle rather than a load that worked best in another rifle. They work sometimes but not often enough for us to list them.

Bowhunthard,

This is a good question. First it is important to clarify that the ogive shape for the 7mm 140 gr VLD and the 168 gr VLD are not the same. Since they are not the same you will have different jump (or jam) if you don't change your seating die.

Now let's assume that you knew that fact and were asking that if one VLD bullet has a sweet spot of .075 jump (for example) will another VLD bullet also shoot well at .075. Frankly, I don't know. The fact that the ogive shape is different and the weight is different suggests that it won't shoot the same (I expect your powder charge will be different as well) but I can't say for sure that it will be different.

Another aspect of this question to consider is that what happens when you switch between bullet weights that have the same ogive shape like the 7mm 168 gr VLD and 180 gr VLD. Both of these bullets have the same ogive shape. Will these bullets have the same sweet spot? Again, unfortunatley, I don't know.

If it were me, I'd certainly start with the same jump (or jam) to see if the sweet spot is the same for both bullets. If it is then your tuning is done (and please post the results as I am curious myself). If it isn't the same sweet spot then you know exactly what to do to find the sweet spot for the other bullet.

Regards,
Eric
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  #35  
Old 02-27-2012, 06:24 PM
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Re: Optimizing Precision And Accuracy From VLD Bullets By Eric Stecker

Does this second sweet spot adjustment only apply to mag calibers or would it pertain equally to a .308?
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