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303 trajectory ???

Author	Comment
Black Lab	303 trajectory ???	Lead	[-]
Posts: 12 (06/21/09 08:03 PM) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	Tags : None I have #5 Carbine with I believe the proper rear sight, dial up to 800 yds/meters ? I haven't had time to take it to the range yet. When I sight all my regular non-Enfield rifles I start with a 25 yd. target and if it is right on at 25 yds. it should be pretty close at 100 yds. I have no idea where a 303 British with 180 gr bullets would be on a 25 yd target with those sights. I'll take a guess and say 3" high ???
shotout		#1	[-]
Posts: 43 (06/21/09 08:59 PM) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	If the sight is the same as the #4 I would think it would be much the same at 25 yds. Depending on the height of the front sight. Then it may drop at 100 yds. compared to the #4. My 91/59 MN is pretty much the same at 25 and 100 yds. Best thing to do is run a few rounds through, taking the same aiming point each time just to get a general idea. Can't really tweak your sights till you know where the bullet lands. shotout
temperflash		#2	[-]
Posts: 407 (06/22/09 02:18 PM) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	Well the bore line is below the line of the sights, so while the bullet always begins to drop relative to the line of the bore the moment it leaves the muzzle it will rise in relation to the sightline until it crosses the sight line. At some point early in its trajectory the sight line and trajectory match, then the bullet will still be on the upwards climb of its corved trajectory in relation to the bore. For some part of it travel it is then above the line of sight, then as it continues on it will cross the line of sight once more at its zero point. There are graphs that show just at what range a bullet will first cross the line of sight at close range, and these allow the shooter to set his sights for an apromimate zero at a longer range. I probably have one of these graphs, though not handy. I'll look for it. The variables are distance between front and rear sights, height of line of sights above the line of bore, and of course the trajectory of the specific cartridge. The shorter sight radius of the No.5 compared to the No.4 would alter the equation.
bambam91		#3	[-]
Posts: 124 (06/22/09 08:48 PM) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	Go to the link on this page to the Jay Currah's The Lee Enfield site. In there is a link on how to sight the rifles in and it gives the impact at 25yds for a dead on hold. If I remeber correctly it is 1-2" high at 25 yds, and a max of 8" high at 100 yds when using the 300 yard battle sight. Correct me if I am wrong, this is just from memory. The adjustable sight on the #5 is calibrated differently than the correct #4 rear sight. I know I had one (#5) mistakenly installed on my Savage #4. It did not shoot where it was supposed to at 25 yds or at 100yds. The shorter barrel will give slower bullet flight and therefore a more enhanced trajectory. So with my #4 it shot higher than it was supposed to. A couple of questions here on the forum, a new rear sight, and problem solved. I hope this helps
bambam91		#4	[-]
Posts: 125 (06/22/09 08:50 PM) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	Real quick. Yes you do have the correct #5 sight. #5 800yds. #4 1300yds.
Black Lab		#5	[-]
Posts: 15 (06/23/09 03:57 AM) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	Wow, A wealth of information right under my nose. Thanks for the link to Jay Currah's The Lee Enfield site

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