Home Forums Reloading Big Game Rifles R17 @ 4 below

Another interesting statistic is whether the load lands in the same place. Determing this, of course, means the rifle must still be sighted in the same as it was in warmer weather.

Luckily, in Montana both a 70-degree test and a 0-degree test can often be made within 30 days or even less!

I didn't stick around too much longer after you left, imagine that.....(grin)
That little breeze was BRISK!


The 257 Roberts and H4350 were shooting a full 6" lower from where they were last time out in October.

Musta been lower velocity....Shoulda brought my Chrony....doh!

His "before" numbers are listed before the "now" numbers

Sam,

Not necessarily, though that might be part of it. I have seen rifles also shoot higher, or right or left, when the muzzle velocity changes.

The big thing is: Now you know!

Interesting JB, a guy learns something everytime out that's for sure.


Beings we aren't working again tomorrow and it's susposed to be 'warmer' might as well go back and shoot some more!

I figure there was a 100 degree temperature difference today between Bozeman and Punta Mita..

No doubt!


Think I frostbit my right cheek on that concrete seat.

I got a bit of a sun burn..

Heck, me thinks there was a 100 degree diff tween when the wind was blowing out @ Logan and when it wasn't...grin

You should see the stock work that old Biesen Sam did on his A7! I kind of liked it, thinkin he could open a company called Redneck Rifle Works...

Dober

I'll probably be there as well, the Radio Shack guy got my clock fixed.

Dober

I'm gonna try and get there before noon. Good deal on the clock.

Pretty fancy stock work if I say so myself.....(laughin')

I've got class from 9-10 but will get out there about noon unless something comes up.

Bring your clock...grin

Dober

Cool, I'll see you there.

And yeah, I'll bring a clock and hopefully a spare battery.
Need to get to the bottom of this Bob debacle!

You guys are having way too much fun. Looking forward to living there next year,2010.

Brad, next time through you better bring one of your Kimbers along. Just might find a yote on the way!

Dober, Just got back to So. Cal and the testing gave me something to do before my flight outta Billings. I have always read so many negative reports about RL19 and 22 and poor performance with cold temps, a real bummer as these powders have shot so well in mag calibers for me, I have been shooting 140 Accubonds and the 71 grs of Rl19 for quite awhile with stellar accuracy at all ranges, Retumbo the same with heavier bullets and RL 25 keeps all the numbers very close, I used Retumbo cause of its Extreme temp listed till I see some real hard consistant info that somethings that much better I will just keep using what has been working for me, heck I could have just kept using H4831 and made life simple, just dont work that way I guess

I don't think Dakota's results are bad at all;there's slight loss of velocity but not enough to worry about.

I can't help but wonder if Sam's lower POI is the result of lower velocity due to low temps, or simply shooting through cold,dense air.Match shooters I know back here have to make corrections in colder temps for long range;wonder if it's lower velocity of ammo or air density(?)

Some match shooters have told me they use Hodgdon Extreme powders,finding them more stable in temperature extremes from winter to summer.They push their 223's pretty hard for LR and blown primers in the summer pretty common

Bob, heck if I know what was going on with the Roberts.

My 270(H4831sc) was dead on at 400 though.

Of course it is a 270!

Well,Sam.....of course!

I'm gonna load up another 20 rounds for the Roberts and head out to the range.

Thinking the only benefit to pouring concrete for a living is you get to take Winter off, drink beer and shoot rifles whenever you want.....(grin)