.375 Ruger....

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Gatehouse said:
What is interesting is that IMR shows. 2632fps with that load and a 300 gr bullet. Which goes to show once again why you need to check your trajectory rather than just relying on charts. :)
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I want to test again
What I have left is for hunting. I have 4 boxes of 300g sierras on order. When they get in I will Test again to make sure.
Got to track down a chronograph to borrow as well
 
cdn shooter said:
I've shot the 300 accubond over a chronograph, I seem to remember velocity in the 2650ish range, that's out of a 22" barrel using Win 760. I have to admit though, as someone who has bad-mouthed Hornady brass for being to soft in the head area to support stout loads, the 375 cases don't seem to display any of this. Makes me want to build a 7LRM.
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I've found the same thing with the 375 Ruger brass. Works great, long life-even with the maximum loads listed.
 
regulate34 said:
@Why Not?
that's exactly how I did my figuring.
the numbers I posted before were actually shot and measured

Is it just me or dose that seam awfully fast and flat for a 300g bullet
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It is very fast. In fact 2800 is the velocity I got with my 375 Weatherby with its 26" barrel using that bullet. Your 20" Ruger is not likely even close to that.

I think you need to check the drop figures again.
Ted
 
It would seem from discussion here that some Horn brass is very good and other, depending on lot and vintage, is garbage. If Reg34 is in fact attaining 2800 from Horn brass with a 300 gn Sierra, then there is nothing wrong with his brass, as this would be getting very close to "red line" with this cartridge. (even for me) However I suspect we have some atmospheric anomalies affecting his drop figures....possibly altitude and pressure density........scope height is also critical and even 1/8" change in scope from bore center changes all the numbers dramatically. Chronograph, chronograph, chronograph...........can't be emphasized enough, everything is just an uneducated guess with out one !!!
 
Right, and here's the predicted drop figures for that velocity.

Calculated Table
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (in) (MOA) (in) (MOA) (ft/s) (none) (ft•lbs) (s) (in) (MOA)
0 -1.5 *** 0.0 *** 2656.4 2.379 4699.8 0.000 0.0 ***
100 1.5 1.4 0.7 0.7 2468.0 2.211 4056.9 0.117 20.6 19.7
200 -1.2 -0.6 3.1 1.5 2287.4 2.049 3484.9 0.243 42.8 20.5
300 -10.6 -3.4 7.2 2.3 2114.3 1.894 2977.4 0.380 66.9 21.3
400 -27.8 -6.6 13.4 3.2 1949.0 1.746 2529.9 0.528 92.9 22.2
15/04/14 13:51, JBM/jbmtraj-5.1.cgi

Ted
 
Like I said I will test again.
I was shooting slightly up hill (25yds rise over 400yds)
temp was around 5c deg
elevation was 3400ft
 
If I did the math right. 25yds rise over 400yds is only 6.25 Degree incline.
put that in a ballistic calculator and it only made 1" difference at 400yds

guess I have to go shoot some more
 
regulate34 said:
Oh and i am in 150milehouse if some one has a crono
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Shot my chrono DRT a couple years ago... no blood trail needed... and that was with a lowly .308... imagine what the .375 Ruger would have done! It would have field dressed it, carried it to the truck, plopped it on the BBQ, and served it for dinner with a side of solder flux...
 
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