terrior Posted August 23, 2011 Report Share Posted August 23, 2011 Hello This sounds a bit o.t.t. but this weekend i decided to find out the trajectory of my .177 rifle. I set up targets from 10mtr to 60mtr every 5mtr spaces. it was dead zero from 15mtr to 30mtr 1mildot drop at 40mtr 2mildot at 50mtr 3.5midot at 60mtr the results gave me the confidence to hunt at various ranges accuratly with a laser ranger. i marked this on the flip up cover for future. like i say it's a bit o.t.t. but i think it's invaluable for use in the field....... cheers.................... Quote Link to comment Share on other sites More sharing options...
eccles Posted August 23, 2011 Report Share Posted August 23, 2011 Not to sure about the dead zero 15 to 30 bit if its zero at 30 should be high at 15 unless its fac Quote Link to comment Share on other sites More sharing options...
terrior Posted August 23, 2011 Author Report Share Posted August 23, 2011 hello it was high at 10mtr but left that out because i don't think i would ever shoot that close cheers............... Quote Link to comment Share on other sites More sharing options...
Billy. Posted August 23, 2011 Report Share Posted August 23, 2011 You need to calculate the PBR (Point Blank Range) of your rifle. For that, you only need a piece of software, punch in all the data and a bit of trial and error. Once you've got that sorted, you can basically shoot at anything between 5-40 yards and know the bullet will hit Quote Link to comment Share on other sites More sharing options...
Gnome of the Woods Posted August 23, 2011 Report Share Posted August 23, 2011 (edited) Not to sure about the dead zero 15 to 30 bit if its zero at 30 should be high at 15 unless its fac Sounds fine to me depending on scope and mounts. Normally 15&35 yd zero on .177 ish! Download chairgun from the Hawke website for a good guide. Paul Edited August 23, 2011 by Gnome of the Woods Quote Link to comment Share on other sites More sharing options...
Darcshadow Posted August 23, 2011 Report Share Posted August 23, 2011 Hawke ChairGun Pro is free and does trajectories very well Quote Link to comment Share on other sites More sharing options...
FalconFN Posted August 23, 2011 Report Share Posted August 23, 2011 Hawke ChairGun Pro is free and does trajectories very well If you have a chrono Chairgun is pretty good, and it will give you a good idea of windage under different conditions and trajectories when shooting up and down inclines. But with most things practice is still best so. Quote Link to comment Share on other sites More sharing options...
eccles Posted August 24, 2011 Report Share Posted August 24, 2011 Hi you sure its dead zero 15 yards to 30 yards.Never seen a 177 thats dead zero like that.If zero at 30 must be about at least a quarter inch high at 15.Dead zero means hitting exact spot between 15 and 30 not a mill or two out.Even my HMR is a mill if thats was zeroed at 30. I'm not trying to be funny all rifles high mid range from zero :good: Quote Link to comment Share on other sites More sharing options...
Billy. Posted August 24, 2011 Report Share Posted August 24, 2011 Hi you sure its dead zero 15 yards to 30 yards.Never seen a 177 thats dead zero like that.If zero at 30 must be about at least a quarter inch high at 15.Dead zero means hitting exact spot between 15 and 30 not a mill or two out.Even my HMR is a mill if thats was zeroed at 30. I'm not trying to be funny all rifles high mid range from zero :good: The pellet will have two zeros, this could be what he means. I'm not sure of the curvature of the pellet, but 15 and 30 yard zero isn't impossible. The zero in between those two numbers should be different though. Quote Link to comment Share on other sites More sharing options...
Gnome of the Woods Posted August 24, 2011 Report Share Posted August 24, 2011 On sub 12ft/lb air rifles. The zenith or top of the pellet flight is normally around 25yds. I zero at 25yds so only ever use hold over. If you zero after the top of the flight you will get two distances that will be dead on the cross hairs. The distances depend on scope height, magnification and power setting. I will put some examples up when I return from holiday. Quote Link to comment Share on other sites More sharing options...
eccles Posted August 24, 2011 Report Share Posted August 24, 2011 Yes your correct on two zeros thats the same whatever airrifle or cf rifle.My point being Newby's comment on being dead zero between 15 and 30 yards is a bit misleading to novice shooter because it cant be dead zero, its got to be a touch high mid way.Not that it matters that much with 177 bacause if zeroed at 35 yards its only half inch high mid range anyway.Reason i'm pointing this out other novice shooter will wonder why their guns shoot high and not zero as newby's.Just trying to be helpful not awkard :good: Quote Link to comment Share on other sites More sharing options...
terrior Posted August 24, 2011 Author Report Share Posted August 24, 2011 (edited) Hello hello to the technomicroscientists you forgot the curvature,spin and x y axis of the earth oh and what calibration is your thermotechnomicrometer at the weekend i only work to 15 decimal places just for a rest. By the way could some technofreak tell me if the pellet warms as it flies through the air due to friction or is it cooled after leaving the barrel by the air. and how much it expands or contracts. just so i can input the information in to my obviusely way out results. this may clear up the discrepancy. Edited August 24, 2011 by newby1 Quote Link to comment Share on other sites More sharing options...
Billy. Posted August 24, 2011 Report Share Posted August 24, 2011 hello to the technomicroscientists you forgot the curvature,spin and x y axis of the earth oh and what calibration is your thermotechnomicrometer at the weekend i only work to 15 decimal places just for a rest. Erm, we were just talking about gravity, actually. You might learn something if you just ask. Quote Link to comment Share on other sites More sharing options...
Jega Posted August 24, 2011 Report Share Posted August 24, 2011 This may help you get the idea , http://www.anstonftc.co.uk/hft-scope-setup-guide/ Quote Link to comment Share on other sites More sharing options...
terrior Posted August 24, 2011 Author Report Share Posted August 24, 2011 HELLO WHAT HEIGHT ABOVE SEA LEVEL WOULD RECOMMEND TO DO THE TEST. SOME PERFECTIONIST WILL POINT OUT THAT GRAVITY CHANGES AT DIFFERENT LEVELS. OR THOSE ASTRONAUT'S ARE REALLY GOOD JUMPERS . Quote Link to comment Share on other sites More sharing options...
Gnome of the Woods Posted August 24, 2011 Report Share Posted August 24, 2011 Your the one that said it was OTT in the original post, and please don't shout! Quote Link to comment Share on other sites More sharing options...
terrior Posted August 24, 2011 Author Report Share Posted August 24, 2011 DID SOMEONE MENTION GRAVITY I BET YOU CAN'T THINK OF SOMETHING OBVIOUS . I WONDERED WHY THE PELLET CURVED DOWN AND NOT UP. Quote Link to comment Share on other sites More sharing options...
Billy. Posted August 24, 2011 Report Share Posted August 24, 2011 I BET YOU CAN'T THINK OF SOMETHING OBVIOUS . I can think of several obvious things about you. Quote Link to comment Share on other sites More sharing options...
terrior Posted August 24, 2011 Author Report Share Posted August 24, 2011 SEVERAL ALL AT THE SAME TIME VERY IMPRESSIVE ...................... Quote Link to comment Share on other sites More sharing options...
durbsguy Posted August 24, 2011 Report Share Posted August 24, 2011 I wouldn't both with altitude and gravity. Gravity does decrease with the increase in altitude but it is negligent. If memory serves me correctly the decrease is 0.3% from sea level to summit of Mount Everest. The 0.3% is however the same percentage that the gravity is less at the equator than it is from the poles due to centrifugal force, but I think that this is taking it to extremities Quote Link to comment Share on other sites More sharing options...
Fat toad Posted August 24, 2011 Report Share Posted August 24, 2011 hello it was high at 10mtr but left that out because i don't think i would ever shoot that close cheers............... Quote Link to comment Share on other sites More sharing options...
terrior Posted August 24, 2011 Author Report Share Posted August 24, 2011 This kind of information is exactly what is needed. You can't be too accurate when having a bit of fun . You may offend the weekend scientists out there..... Quote Link to comment Share on other sites More sharing options...
Fat toad Posted August 24, 2011 Report Share Posted August 24, 2011 Hi newby1 I'm keeping out of above posts but just to tell you a bout 10mtr shot my mate bagged a rabbit at 35yds through is scope when he went to the rest their was another at about 15yds it was spooked but he got it with is laser which he had zero at 10mtr I wouldn't be able to do it mind you he as 40yrs experience hope this helps with why they shoot at 10meters Frank Quote Link to comment Share on other sites More sharing options...
terrior Posted August 24, 2011 Author Report Share Posted August 24, 2011 Nice one A real person at last. that message was a breath of fresh air, i was just trying to point out how you could be more confident and accurate at different ranges, with a bit of homework on your rifle trajectory. Much appreciated .......................... some people need to lighten up cheers............. Quote Link to comment Share on other sites More sharing options...
terrior Posted August 24, 2011 Author Report Share Posted August 24, 2011 (edited) x Edited August 24, 2011 by newby1 Quote Link to comment Share on other sites More sharing options...
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