Posted: 7/17/2011 9:22:37 AM EDT
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A mate of mine has just bought a Nightforce scope with the NP1RR scope and mounted it on a Sako TRG in 308 win. He has zeroed the middle cross hairs at 100m, now for the big question. On the reticle there is holdover marks and a few further + marks, now using the range finder isn't the problem, that starts with the holdover at larger ranges using the further reticle + & markings at found ranges??
Has anyone got one of these scopes and have you mounted it on a similar weapon and can tell me what markings are for what distances??? Cheers. Tony |
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Quoted:
A slightly crazy suggestion... (for a dude) but has he read the manual? Yep and it isn't much use, as who knows how many MOA his particular ammo will drop at what range.. He was trying to find a quick fix for all before going to a known distance range, which with the closing down of the German army bases are becoming a rarity, and the one that has just closed near here only had 250m max... Tony |
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the first + below the cross hairs is 8MOA, the second + below is 20MOA
http://nightforceoptics.com/RETICLES_OVERVIEW/RETICLES_DETAIL/reticles_detail.html http://www.nightforcescopes.com/NP-1RR-15x_copy.pdf As you say Tony the problem is he doesn't know the come-ups for his ammo. My Nightforce has the NP-R2 reticle with 2MOA stadia on the vertical axis, simples if you know your come-ups 
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Is the scope ret in first or second focal plane ?
If it's an FFP scope then the ret drops will be correct no matter which power the zoom is on. Ifs it's an SFP then the ret drops will only be correct , normally at full zoom. At any other Power some maths calculations are needed. Posted Via AR15.Com Mobile |
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Quoted:
Is the scope ret in first or second focal plane ? If it's an FFP scope then the ret drops will be correct no matter which power the zoom is on. Ifs it's an SFP then the ret drops will only be correct , normally at full zoom. At any other Power some maths calculations are needed. Posted Via AR15.Com Mobile SFP |
Thanks for the links, not what I was looking for, as google had already sent me there before I started this thread  . I was really hoping that one of you guys had done all the footwork and had a chuff chart with all the range solutions from your own experiences. BTW. the bloke who owns the rifle could stumble over an MOA on the dance floor and wouldn't recognise it, and I'm not much better .
Oh well, not to bother  .
Tony |
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There is a mark on the zoom ring which when selected gives true value to the reticule Tony [ i cant remember the number ] he needs to do all his work on that mark, as its 2fp. Far easier to input his rounds velocity etc into a programme and dial. Cheers Dave, he doesn't have an Ipod or the software/app, could you suggest a source, please. Tony |
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JBM http://www.jbmballistics.com/ballistics/calculators/calculators.shtml Thanks pal, I think, now which one should I go with, I say I in this case because I'll be translating it into German for him, and not having much of an idea myself it will prove difficult for both of us, but at least we get along well so it'll be a laugh learning together. Tony |
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Hi Tony Give this one a try: http://www.jbmballistics.com/cgi-bin/jbmtraj_simp-5.1.cgi If you get me the load data he's using & scope height above bore , I'll get some drop figures for you. Cheers steven Posted Via AR15.Com Mobile That's sweet, I won't be seeing him until midweek, but I'll get the data to you when I have it, big thanks from him and I. Tony |
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Here,s the one i,ve used for years Tony, its very accurate indeed, but you have to be exact with your input data.
http://www.biggameinfo.com/BalCalc.aspx Ignore the sectional density, it auto fills for you. The Temp of 59 is an average and useable. Bullet ballistic coefficients are available from all the manufacturers websites, and the scope height is easy measured. If you get stuck, shout up. |