Caribou Gear

Absolute Hammer Load Data

winmag

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Jan 3, 2018
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Colorado
At that point, even if I’m not hitting pressure I’ll have all the velocity I care about.
Looking good! I’d keep going until you find pressure, then back off. In my experience, Nosler brass will ejector mark way before you get a sticky bolt.

I bet you get above 3100fps.
 
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noharleyyet

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The absolutes will scoot for sure...wish I could've found the node for appreciable speed gain with the RUM but pressure showed up early. Was tempted to re-alchemy the .257 with em but decided to leave more than good enough alone but still might get some 90g absolutes just for crono grins.
 

JLS

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Looking good! I’d keep going until you find pressure, then back off. In my experience, Nosler brass will ejector mark way before you get a sticky bolt.

I bet you get above 3100fps.
Steve emailed me back this morning. He thinks I'll run out of case capacity before I pressure out, and also thinks 3200 is possible.
 

winmag

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and also thinks 3200 is possible
I imagine that'll be fast enough to make you quite happy!

Looking at the powder burn rate chart, there aren't too many options for temp stable powders that are slightly faster than RL16. You could try Varget if you wanted to keep tinkering, but if I got 3200fps out of that combo I think I'd be done.
 

Mule man

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Oct 7, 2020
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Primers starting to flatten at 57. Bolt lift is fine. Ejector marks, but honestly they showed up around 2950. Not too worried about them.
Very impressive ,did you put a few on the heater and try them? Velocity is great and where they should be. Awesome load
 

stevejfarms

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Dec 25, 2017
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SE Mo
Finally got to shoot today!
257 Weatherby
26” 1-10
90 gr. AH
Once fired Hornady brass
Fed 215, COAL 3.170 Lee FCD 1/4 turn
IMR4350
63 gr. 3380
64. 3458
65 3509
66. 3557
67. 3675
No pressure signs, no felt recoil changes, will have to load some more and push a little farther.
IMR 4831
71 gr. 3761
72. 3852 faint ejector swipe
73. 3968 ejector, flat primer, heavy bolt lift, quit here, big recoil impulse. Quit here.
Rl26
62 gr. 3140
63. 3137
64. 3189
65. 3271
66. 3244
Nothing happening here, need to jump at least 4 gr. and see what happens, lot of case cap left.
IMR 7828 SSC
71gr. 3564
72. 3677 slight primer flattening
73. 3701 primer
74. 3766 primer
75. 3833 primer flat slight ejector
Need to push this one up a couple more grains and see.
72-75 were touching and 71 was about an 1/8” outside the group so it’s accurate anyway. Might need to live here, 3700 or so ain’t bad.

Hornady factory 90 gr. GMX averaged 3440.

26 nosler
26” 1-8
123 gr AH
New Nosler brass
Win. lrm primer
3.30 COAL
IMR 7828 ssc
74 gr. 3291
75. 3385 very faint ejector
76. 3403. “
77. 3462. “
78. 3506. “
79. 3555. “
80. 3585. “ primer flat
81. 3666 slight ejector primer flat
82. 3695 ejector primer flat
83. 3768 heavy ejector, flat primer, heavy bolt lift, quit here
77-80 were touching that’s where I’ll live for now 3550 avg. ain’t bad!
I’ve got some 129’s loaded and some 140’s for 280 ai, but ran out of time today. Will report back later how they turn out, hopefully tomorrow if the rain holds off.
 
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rtraverdavis

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Oct 20, 2016
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OREGON
I never posted my velocity results from last weekend, so here goes:

6.5 Creedbro
22” barrel
Twice fired Nosler Brass trimmed to 1.905
RL15
Fed 215M Primers
123 grain AH
2.810 COAL

40— 2780
40.3— 2803
40.6— 2836
40.9— 2864
41.2— 2888
41.5— 2870 ?
41.8—2935
42.1— 2963 slight ejector swipe
42.4— 2972 ejector, flat primer
42.7— 3007 heavily cratered primer, heavy bolt lift, stopped here

I was hoping to land somewhere above 3000 fps before pressure, but I don’t know if I can with the powder I have on hand and the 22” barrel. After talking with Steve this week he suggested I give it another go with 210s instead, so that’s what I’ll do and post after I get those results. It’s tough getting out to shoot at the moment so it may be a few weeks.
 
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