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Long jump to lands

 
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  #1  
Old 06-16-2010, 01:25 PM
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Location: West Virginia
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Long jump to lands

I am loading 168g Berger VLD's in my 7mm RM hunting rifle (Rem 700 ADL)

I began seating the bullet at the max length that would reliably feed from my magazine.
Eventually, I was able to get decent accuracy with a jump of .142 from the lands. In fact, the accuracy was very consistant at this jump.

Now that i have a load that is fairly accurate (.73 MOA @ 100 avg) i have 2 questions

1. Is this jump harmful to my gun?
2. If not, at what jump distance if any, does it become harmful.

BTW i am still above the max listed 3.290 COAL listed in my Lyman manual
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  #2  
Old 06-16-2010, 02:00 PM
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Re: Long jump to lands

Sound good to me not hurting anything. Try shooting groups at 200 yards to see how your load is this will give you a better indication of how your gun is going to shoot at longer distances. I shoot for one hole at 200 yards before I try any longer shots.

Jon
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  #3  
Old 06-16-2010, 07:29 PM
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Re: Long jump to lands

You have discovered two truths:

1. Book OAL numbers don't mean anything but a place to start...for those who need that.

2. Seating close to the lands is NOT a key to accuracy.


You're doing good.
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  #4  
Old 06-16-2010, 08:17 PM
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Re: Long jump to lands

We have loaded for a 7 RUM ( Sendero) and the closest we could seat due to mag box length and a long throat was 1/4 inch and it still shot. These were the Barnes TTSX 150"s. I don't think you could seat a bullet that far into the cartridge case to make it a problem. Start around SAAMI specs and then lengthen so it still fits in mag box and shoots accurately...Bryan did an article on the "nodes" that the Bergers will shoot well. IF I remember correctly it was touching the lands and then shorten in .040 increments all the way to .120 off the lands...I agree with BoomTube. You never know for sure that one length will always work...experiment around and you'll find the key to that rifle,powder,primer,brass,bullet combo! Good luck 30-338
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  #5  
Old 06-16-2010, 08:41 PM
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Re: Long jump to lands

Thanks for the replies guys.

So there is no damage to the throat when a bullet has to jump long distances before it gets there?
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  #6  
Old 06-17-2010, 11:19 AM
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Re: Long jump to lands

What happens in the throat is basically the same, jump or no jump.
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  #7  
Old 06-17-2010, 11:33 AM
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Re: Long jump to lands

Quote:
Originally Posted by Dannyd View Post
I am loading 168g Berger VLD's in my 7mm RM hunting rifle (Rem 700 ADL)

I began seating the bullet at the max length that would reliably feed from my magazine.
Eventually, I was able to get decent accuracy with a jump of .142 from the lands. In fact, the accuracy was very consistant at this jump.

Now that i have a load that is fairly accurate (.73 MOA @ 100 avg) i have 2 questions

1. Is this jump harmful to my gun?
2. If not, at what jump distance if any, does it become harmful.

BTW i am still above the max listed 3.290 COAL listed in my Lyman manual

You may want to try something like a 168gr match king or a 160 accubond So you can
get a little closer to the lands but still fit in the magazine.

Some bullets place you farther away from the lands, These two will solve this for you
and still fit in the mag.

Just a suggestion

J E CUSTOM
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