And a final side-note, the calculations you sent me were set at sea-level.
Try recalculating the 168 at 3200 feet, with a 105 degree temp. I live (and shoot) in the upper end of Mojavie desert, not Ohio. You will notice that the 168 round, under these conditions, only drops to 1,352 FPS at 1,000 yards.
Hi Mag,
Love those videos. I ran your numbers through Hornady's ballistic calculator using THEIR ballistic data for the round with your velocity. The results are very close to what you've previously posted. Hornady's Humidity is higher then you see in the desert which is working against the calculated final velocity. Even with that factor working against the final answer you're still supersonic. (Your muzzle velocity is probably a tad higher since you probably chrono'd the speed at some distance down range from the muzzle.) So your actual velocity will be slightly higher then reported here.
Hornady's basaltic calculator using your previously posted data.
1316 FPS @ 1000 yards
Here is the speed of sound calculations based on your 105F
1165.374 FPS
1316 > 1165.374 Therefore your still supersonic.
As far as I'm concerned your round is still super sonic at 1000 yards, the video was great and nice shooting.
Here is a snippet from NASA's website. Based on the velocity give by hornady for your load at 1000 yards and your altitude.
So your round is going Mach 1.194
su⋅per⋅son⋅ic
–adjective
1. greater than the speed of sound waves through air.
2. capable of achieving such speed: a supersonic plane.
-- Let me propose a real simple video test the next time you shoot at 1000 yards.. Put a camera next to the target (make it a paper target so the impact sound doesn't mask what we're looking for) and record the audio. If the round makes that tell tale "crack" as it passes the camera its supersonic.
Last edited by JustPassingThrough; 04-10-2009 at 05:39 PM.
-- Let me propose a real simple video test the next time you shoot at 1000 yards.. Put a camera next to the target (make it a paper target so the impact sound doesn't mask what we're looking for) and record the audio. If the round makes that tell tale "crack" as it passes the camera its supersonic.
Thank you! Outstanding idea, I will try to make it out there in the next few weeks and do exactly as you have stated with the recording device. That clearly would reflect one way or the other.
Thanks again,
Ernest.
[ I was told by others that this kind of obfuscatory ranting was something you have a bit of a "name" for over on YouTube...a pity you decided to bring it here.
Yes and no, I’ve been involved in several heated political discussions where I have made comments that I have later regretted, not that I regretted the subject, but I have regretted the childish manner that I acted. And on occasion during these debates, I have been drawn into the personal attack game, also of which I’ve regretted.
But these have been political in nature and topics and/or related to the JFK assassination. I am a proud conservative, anti-statist, and I feel there was not a Govt conspiracy in the JFK assassination. These stances I’ve taken in numerous, sometimes regrettable, debates-disputes.
Regarding any ranting on any subject matter regarding my rifle collection videos?? Off the top of my head I cannot recall anything that would fall under that category, with the exception of AKA 1884... Outside of that silly event, there is nothing.
You know someone that claims I was abusive towards them??? Only AKA 1884, if it were anyone else, then you and you informant are mistaking me for someone else.
Okay Mag, let it go. MODERATOR
Last edited by Bill Hollinger; 04-10-2009 at 11:52 PM.
I mentioned that Im "easing" my wife into this... here is a short clip of her shooting our M1D. (She likes the bi-pod on it)
She is nowhere near what your wife is doing, but she is gradually having more fun with it...Eighteen years of marrage, she has come this far anyways...
Last edited by Mag30th; 04-10-2009 at 11:12 PM.
Reason: typo
Mag30th, excellent videos. It is nice to see what the old warhorses can still do in original configuration.
I think that a lot of the current crop of service rifle and cowboy shooters modify the heck out of them and lose thier appreciation of what these fine old firearms were originally designed for.
Don't let the critics get you down and keep posting those great videos.
Picked up M1D from CMP. Acquired MRT Cheek Pad, M84 scope & T-37 Flash Supressor. Sighting in at NRA range in Va-150' indoor and encountered large changes in vertical point of impact with sn change in settings. Scratching head and finally found brass inprints on top tine of T-37. The bullets are impacting the T-37. Can remove but would like to resolve and use-fit is snug. Can't be the first to encounter-all help appreciated/Cheers/Jake in Va
Jake1, you may have more success if you start a new thread of your own.
Just go to the top of the forum above the stickies and hit the small "New Topic" button on the LH side. That way your concerns aren't lost when people re-read through some of these older posts above! We're easily distracted...
I forgot to mention that she had a few boxes of Federal Match .308 155gr which is no longer manufactured or sold.
Using the same rifle, range and wind conditions, she fired lots of that ammunition at the same 4 foot target at 1,000 meters (1,100 yards approx) and her groups were consistently less than 12".
However, perhaps more germane to this discussion was the fact NONE of the 50+ rounds of 155gr she fired "key holed" like the 168gr Federal ammo did. All were clean well defined holes and apparently remained stable right to the target.
Regards,
Badger
Conventional wisdom is that the 168 grain Sierra Matchking is not a good choice for 1000 yards.
If that is the case, why does the 155 grain SMK apparently work well for Palma shooting out to 1000 yds?
I do not have the numbers, but the 168 appears to have more bearing surface and surely has a better ballistic coefficient.
Regards
Jim
“...successful rifle shooting on the range is nothing more than first finding a rifle and lot of ammunition which will do precisely the same thing shot after shot, and then developing the same skill in the rifleman.” ~ E. C. Crossman
Sir I salute you, this is most impressive. I recently took out My Mosin Nagant with refurbished optics. I Was determined to break the 750 yard mark, needless to say I was not able to. Even with 175 grain the closest I was able to get to the mark was 720. So I would say in my opinion this settles for me why the M1 was the most feared rifle in the field in WW2. I guess now I need to save up and get me a really nice M1.
Originally Posted by Mag30th
Register To Reply
Enough
