I'm sure there is info somewhere but I couldn't find it. I had a good load at 50* now it's not so good at 70* - 6br 105s, 30 gr Varget. What to do?
ty Don
Amen! Everyone wants to blame the gun, the powder, the scope, morning coffee was to weak. Never they didn't have the gun tuned to start with, they tune with no flags, they have poor bench manners, they skimp on case prep, and the list goes on.So now we will play the nursing game with our load and they wonder why they can't compete. Well get a wide stock, a heavier rifle, a bigger scope, a more expensive rest, that will make it up. I have always had the belief a mass majority of guns on the line are not tuned.Id be looking at something else. Double check the touch point see if you need to adjust seating. In Mt. with the stable powders like H4895 and Varget, same powder charge all year within a kernel or two and thats more like 80+ degrees. In my experience, when a tune is moving around you dont have the right tune to begin with. Now some powders are very temp sensitive. Thats a different story.
Amen! Everyone wants to blame the gun, the powder, the scope, morning coffee was to weak. Never they didn't have the gun tuned to start with, they tune with no flags, they have poor bench manners, they skimp on case prep, and the list goes on.So now we will play the nursing game with our load and they wonder why they can't compete. Well get a wide stock, a heavier rifle, a bigger scope, a more expensive rest, that will make it up. I have always had the belief a mass majority of guns on the line are not tuned.
Wow,Several years ago I had the opportunity to test the same load, fired with the same rifle within a span of several months with temperatures from 80° to 0°.
Timely thread. I had been wondering the effect of temperature on H4831 or H4831SC. I had data of muzzle speeds as measured with a Labradar at 80° and 40° temperatures, but I wanted some data a bit colder.
Fortunately, this past week we had some cold days, and I used the opportunity to add to my data. On Wednesday 26 January 2022, I shot at the BRRC in Wright City, where I normally shoot, and where I collected all the data. After setting up the ShotMarker target, the LabRAdar, and other gear, I started shooting at 7:45 am, and shot until 8:30 am. The temperature remained at 0°F...
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Just my 2¢
Alex (Müller)
It's a close second to tuning based on the D.A. (density altitude).Velocity is not directly linked to tune. If you get in a mentality that my rifle has to shoot xxx fps all the time you will chase your tail.
This is true in my testing, but, it is pretty tough for most powders to handle a big swing and stay on point in my experience.Velocity is not directly linked to tune. If you get in a mentality that my rifle has to shoot xxx fps all the time you will chase your tail.
It's a close second to tuning based on the D.A. (density altitude).![]()
100 percent with you on flags. Tuners no and I have been using tuners since most shooters did not know what they were. Can you ever lightly refine a good tune with a tuner, occasionally. I have made a tune shoot rounder if not tighter. I like round. Perhaps your tuning skills could get better? My thought of a tuner is to get back to were I started when I feel the gun is going away from me, period.it is impossible to tune a benchrest rifle without wind flags and tuner....IMO of course.