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Reloading Berger Bullets


Ladder test interpertation

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Unread 07-17-2008, 10:54 PM
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Join Date: Mar 2004
Posts: 150
Ladder test interpertation

Before anyone ask I don't have a chronograph (someone stole it) 22-250 80gr. Berger VLD's H-4350 1 to 3 mph wind mostly calm and 300yds.

Last edited by Preda8or; 07-18-2008 at 10:12 AM.
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Unread 07-18-2008, 02:47 AM
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Join Date: Feb 2008
Location: Oregon
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I don't get it? Can some one tell me how a ladder test works in reguards to finding the best load.
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Unread 07-18-2008, 08:09 AM
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Location: Mountians of SW NC, near Asheville
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A little confused, as usual. Are the targets of the same load, fired on the same day? If so, it looks to me like you need to try another powder or primer or seating depth because of the lack of consistancy.

On the other hand, the right target suggests your starting load, 36 to maybe 36.3 would be worth pursuing. Even then, that's a really narrow accuracy window, or 'sweet spot." I prefer seeing hits with less dramatic changes as I approach and leave the sweet spots.

Last edited by boomtube; 07-18-2008 at 12:09 PM.
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Unread 07-18-2008, 08:58 AM
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Join Date: Mar 2004
Location: Central Mt.
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Looks to me, like you have 2 nodes in the right target. Which velocity could you live w/ in relationship to the accuracy factor? 1/3' elevation is nothing to sneeze at for a 300yd group.
However, your 1st target contradicts your 2nd. Was every shot a 'good shot'? If not, I would be shooting this again. A component change may be in order---Primers, maybe?????
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Unread 07-18-2008, 09:46 AM
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Join Date: Jan 2008
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I'll agree that on the right target there appears to be two nodes - as far as vertical dispersion goes. The biggest problem I see is that the left target doesn't have agreeing results. In fact, that target doesn't show any solid nodes for development. At this point I would double check my componets and process for case prep. Something is giving you some serious variance in pressures/ MV. Do you know what amount of jump this setup likes yet? I'd run a ladder test around the amount of jump - and use that data to set the OAL for your ladder test for powder amount. Just my 2 cents...
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Unread 07-18-2008, 10:18 AM
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Join Date: Mar 2004
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3rd ladder posted. The thing I'm wondering Is the 36.6 and 36.8 seem to stay about the same elevation, Would it be worth trying different seating depths with a 36.7 grain charge?
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Unread 07-18-2008, 10:34 AM
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Join Date: Oct 2005
Location: Michigan
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How accurate is the rifle with the best load you've ever shot in it?

If it is a sub 1MOA rifle, then the ladder may mean something. However, if the rifle is not necessarily that accurate, then the natural size of the group can overwhelm the ladder results. (I hope that made sense)

For example; if the changes of .2gr move the impact point 1/2 MOA, you would see a repeatable pattern with a super accurate rifle/shooter/conditions combination. But if the rifle/shooter/conditions combo is only capable of 1moa (or larger) groups, the 1/2 MOA change would be impossible to discern. If the .2gr change is only moving the impact 1/4 MOA, it would take a seriously accurate rifle to see the difference on a ladder.

I know you don't have a chrono, but without the velocity info. it's really tough to make an informed choice.

I agree with tx_shooter, pick a load and play with the seating depth (I'd probably load some at 36.7 and shoot 3 shot groups with different seating depths). Then after selecting the best seating depth, I'd do a ladder around 36.7 and see what it looked like.

Good luck,

If some is good and more is better, then too much is just right.

My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
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