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Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
#5863551
08/05/15 12:53 AM
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Joined: Dec 2008
Posts: 41,085
J.G.
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Factory barrel, action, and stock. +/- 77.0 gr is looking promising. This wa shot at 500 yards today, and yes there was some mirage!
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: J.G.]
#5863559
08/05/15 12:55 AM
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Joined: Dec 2008
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J.G.
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: J.G.]
#5863598
08/05/15 01:14 AM
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Joined: Mar 2012
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Cleric
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What is the min distance for ladder test?
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: Cleric]
#5863606
08/05/15 01:19 AM
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Joined: Dec 2008
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J.G.
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300 yards.
Even there they can be tough to read. They do spread at 300, but you have to knw what you're looking at when shooting a custom barrel chambered by a good smith. Meaning those shoot most loads very well.
500 yards gives more clear data in my opinion. Today the range had a 5-10 mph wind from 1-2 o'clock, but with the great BC of this bullet I didn't worry about it.
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: J.G.]
#5865287
08/06/15 01:45 AM
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Joined: Dec 2009
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Big Fitz
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Hmmm....from what I've read the ladder test is invalid with crinkled paper...
I was wrong...on anything technical. Fitz............. is right, ya know............
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: J.G.]
#5866011
08/06/15 03:39 PM
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Joined: Aug 2009
Posts: 3,124
postoak
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What is the purpose of the ladder test?
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: postoak]
#5866022
08/06/15 03:46 PM
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Joined: Dec 2008
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J.G.
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To cut down on the amount of ammo produced and therefore the amount of shooting to find the right powder charge.
Barrels move in a sine wave. The ladder test will show where the bullet is leaving when the barrel is most stable, i.e. when the barrel pauses from upward deflection before lower deflection.
Notice every one of those charges are of a different powder charge, yet some group togther. 76.8 gr and 77.2 gr grouped 7/8" apart at 500 yards. That tells me I need to fine tune my load around 77.0 gr.
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: J.G.]
#5866083
08/06/15 04:30 PM
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Joined: Aug 2009
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postoak
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Ah, very clever! Too bad most of us don't have access to long ranges like that.
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: postoak]
#5866163
08/06/15 05:16 PM
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Joined: Dec 2008
Posts: 41,085
J.G.
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That is the major down side to it. Not everyone has access to 500 yards all the time.
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: J.G.]
#5866173
08/06/15 05:19 PM
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Joined: Mar 2012
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may have a node around 78 too
78.4 and 78 do not look to have too much vertical seperation
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: Cleric]
#5866196
08/06/15 05:29 PM
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Joined: Dec 2008
Posts: 41,085
J.G.
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may have a node around 78 too
78.4 and 78 do not look to have too much vertical seperation I agree. That pesky 77.6 screwed up the roll I had going. No way did I drop the rear bag and cause it to land up there. But it went smooth off the reservation as compared to the loads above and below it.
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: J.G.]
#5866259
08/06/15 06:12 PM
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Joined: Jul 2011
Posts: 672
glb1955
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Found another good use for duck tape though.
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Re: Ladder test. Tikka 300 Win Mag 210 gr Berger, H-1000
[Re: J.G.]
#5866302
08/06/15 06:39 PM
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Joined: Mar 2012
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Cleric
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For grins i may try this at 200...
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