Carnuba Red, Fryxell Lube, LBT Blue, in 357 TC rifle.

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mtngun
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Carnuba Red, Fryxell Lube, LBT Blue, in 357 TC rifle.

Postby mtngun » Sun Feb 22, 2015 8:31 pm

Today I mainly wanted to test Carnuba Red lube, but included several other lubes just for comparison.

The usual load of 17.9 gr. WW296, 160 gr. plain base spitzer, oven treated WW, sized 0.360", winchester magnum small pistol primers, 1.840" COL. 27" Green Mountain barrel with very sloppy throat.

Procedure was to fire 3 seasoning rounds, followed by two 10-shot groups at 100 yards. I calculated the mean radius for each 10 shot group, then averaged the two. I only had enough cases to test two lubes at a time, then I had to pause to reload, so the barrel would cool completely down by the start of the next round of tests.

It was 15 degrees outside, but 50-ish inside the shooting shack.

First up, Fryxell lube, 50% moly lithium grease, 50% beeswax.
-- 1992 fps, 1.87% standard deviation (poor)
-- 3.53" MOA
-- 0.945" mean radius
Image

Next, LBT Blue. I believe this is the "hard" version of blue.
-- 1987 fps, 1.19% standard deviation (not good)
-- 2.45" MOA
-- 0.82" mean radius

More to come .....

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mtngun
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Re: Carnuba Red, Fryxell Lube, LBT Blue, in 357 TC rifle.

Postby mtngun » Sun Feb 22, 2015 8:56 pm

Next up, Rooster HVR with Moly Powder added:
-- 1995 fps, 0.78% standard deviation (decent)
-- 2.45" MOA
-- 0.76" mean radius
Image

Next up, Carnuba Red from White Label Lube:
-- 2001 fps, 1.12% standard deviation (not so great)
-- 1.98" MOA
-- 0.67" mean radius

More to come ....

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mtngun
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Re: Carnuba Red, Fryxell Lube, LBT Blue, in 357 TC rifle.

Postby mtngun » Sun Feb 22, 2015 9:13 pm

Rooster HVR, my go-to lube:
-- 2010 fps, 1.07% standard deviation (so-so)
-- 2.03" MOA
-- 0.55" mean radius.

Note that the barrel cooled down as I loaded these, I shot the top group first, the bottom group second. I believe that in every case today, the second group was better than the first group. More on that later.
Image

Summary and Conclusions next .....

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mtngun
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Re: Carnuba Red, Fryxell Lube, LBT Blue, in 357 TC rifle.

Postby mtngun » Sun Feb 22, 2015 10:11 pm

Rooster HVR had the highest velocity.
Image

HVR + Moly had the lowest standard deviation.
Image

Rooster HVR had the smallest mean radius.
Image

Conclusions and Lessons Learned
-- it's tough to beat Rooster HVR for full throttle loads.
-- but HVR is not in production at this moment :cry: (it might return eventually).
-- Carnuba Red is 95% as good as HVR, and is readily available. Until HVR becomes available, Carnuba Red seems to be the next best thing. Most people will not be able to tell the difference between HVR and Carnuba Red.
-- none of the lubes fouled this barrel, so fouling was simply a non-issue in this test.
-- it seemed like the 2nd group was always better than the first group, so apparently I was not seasoning/warming the barrel enough before beginning group shooting. I should probaly shoot at least 5 warm-up rounds, and maybe even 10. :?


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