I understand that when you are positioned uphill from your target and are shooting on a downhill slope, you will need to dial less elevation or have a lower hold. What about if you are shooting uphill? Do you dial more elevation or a higher hold? Does shooting targets uphill and downhill have any effect on the amount of windage needed? For instance, let's just assume that your target is 800 yards away and on a downhill slope. You have determined that due to the slope that you need a 725 yard hold on elevation. Do you calculate your windage needed for 800 yards or 725 yards? I know that this basically all comes down to physics and may be an elementary question for some but I am in the dark when it comes to shooting on substantial slopes. Everywhere that I shoot is relatively flat. Thanks in advance for any input on this question.
pricosurf
Oct 17For sale is a custom 7-300 win mag custom ELR rifle with Bartlein barrel and Mirage ULR chassis made by PMAC precision. Rifle comes as a package ready to go which includes a scope, custom load, confirmed DOPE to 2,550 yds, dies, bullets brass - everything you need to hit targets to 2,500 +. Avoid the 4-6 month wait for a custom builder. It has approximately 400 rounds down the tube. I took the ELR3000 course with this rifle and reliably hit targets to 2,551 (~2/5 were hits). I have a custom hand load as well as a load worked up by Copper Creek Cartridge that is sub 0.5 MOA and can be ordered direct from CCC if you are not a reloader. This is the load I used to hit out to 2,551 yds. Asking $5,995 for everything plus shipping (rifle alone is $6,700 + 6 month wait when new). I added everything up and it is well over $10,000 for everything included. Details on what is included in ELR package (happy to discuss any and all details by phone): Rifle: The rifle is a PMAC precision 7-300 win mag ( https://www.pmacprecision.com/rifle-packages ). It is essentially the same as Rex's and was built about the same time. I have heard that a rifle similarly configured has been used in field in limited circles. It has a 26 inch Bartlein heavy profile (MTU contour) barrel with a 1:8 inch twist. Action is a Stiller TAC 300 with 30 MOA scope rail. Trigger is a Jewell. Muzzle brake is an APA Gen II Fat Bastard. The chassis is a Mirage ULR chassis with an upgraded adjustable stock (the stock is awesome and has a lot of adjustment). Scope: IOR Recon 1 with 40 MM main tube. The scope tracks 100% on paper (see pics) and all the way out to 2,500 yds +. Has German Schott glass. It comes with a 40 MM American Rifle Co. 30 MOA M10 QD-L scope base ($300), a 40 MM bubble level ($34), Tenebreax cover for ocular ($38) and an objective sunshade. Reloading equipment: - Redding 7/300 win mag die set - 150 Nosler 300 win mag virgin cases - 120 RWS 300 win mag brass (virgin): this is arguably the very best 300 win mag brass and is very expensive ($41/20 and only available from one location). - 200 once fired Hornady cases from Copper Creek Cartridge loads - 150 195 gr Berger EOL bullets - 100 197 gr Sierra bullets - 100 Hornady 180 gr bullets Data/resources: - Custom Ballistic XLR ballistic data package with DOPE past 1 Mile (includes many tertiary ballistic data) - Confirmed DOPE to 2,500 https://i.imgur.com/Tg5wi2A.jpg
Check Rex's video https://youtu.be/cKqZdHRlKfo?list=PLJUaiRIEduNXoal2_PkBZi0vDCIcEPxUn
As I understand it, you dial for actual horizontal range, but your atmospheric corrections (temp, barometric pressure, and wind) use the measured distance. Rex explains it much better!
I don't think Rex is telling the full story here. If you shoot up at a target, gravity pulls your bullet down and it also pulls your bullet back. If you shoot down at something gravity still pulls your bullet down. But it also pulls your bullet forward.
To express this imagine two extreme angles at 80• up and at 80° down. Your up bullet gets pulled down and back, slowing down the bullet. And your bullet down gets pulled forward adding speed to the bullet, or at least not slowing down as much as when you shoot up.
Theoretically there is a difference between shooting uphill vs downhill. Practically don't even think about it... the cosine or the horizontal distance is not quite correct but is good enough.