223 50 Yard Zero?

[slipper 116]

Tried some homeloads just now checked zero at 50 yards and had 3 shot groups all touching clover leaf, am I right in thinking it will be high slightly at 100 and back in zero again at 250? Using 40 grain vmax

[hutchey 147]

Ballistic calculator? Jbm ballistics

[danw 1,748]

Tried some homeloads just now checked zero at 50 yards and had 3 shot groups all touching clover leaf, am I right in thinking it will be high slightly at 100 and back in zero again at 250? Using 40 grain vmax

 

unless you know the velocity of the bullet then it's all a guess so your options are chronograph and trust the ballistic tables or and the one I would recommend get out there and find out on target

[slipper 116]

Yeah you're right just being lazy lol its just that I'm not a member at a range and the cover is up on most of my land, silage will be cut this week and ill have a afternoon testing

[alan81 110]

with Hornady 40gr a 50 yard zero would be the same as a 200 yard zero and if your shot was 0.5" high at 50 yards it would be the same as a 250 yard zero but your using home loads so that's of no real use to you.

[slipper 116]

I have checked the velocity which is 3382 fps gives me 1" high at 100 and only 0.3" low at 200, and 5.8 low at 300, very happy with that, I was getting 3800 with my old powder which was accurate 2460, but cant get it so this is a recipe with viht 133

[rimmer 33]

well i chrono mine and with a 50yrd zero they are low 4.9" at 250, but this is 55g with muz vel of 3210fps

3382 is proper top of the tree numbers, are you sure ??? how many shots did you avarage out to get to that number

Edited June 10, 2014 by rimmer

[slipper 116]

These are 40 grain v max mate just the figures I got out of the hornady reloading manual to be honest with the bullet size and powder weight

[slipper 116]

Using remington cases 7 1/2 remington primers and 25 grains of viht 133 with an oal of 2.230, 27.8 grains of acc 2460 was what I was using before which was apparently 3800 fps

[danw 1,748]

don't' take it as gospel from a reloading book mate a chronograph is the only way to truly know how fast the bullet is

[slipper 116]

Point taken thanks for the advice which chronograph do you use

[danw 1,748]

I borrow a chrony f1 think there about a 100 notes

[hutchey 147]

Or if you are lucky enough to have a good few hundred yards (plus backstop ) then best to get on paper and try some rounds.

Best way is always to get real data!

[andyf 144]

Google 'shooters calculator' and then read & understand about near zero / far zero.

You can set your own size 'tube' for the bullets flight, but you still a chronograph to make it worthwhile.

It gives you the near zero range which is nearly always 50 M or less, so most ground can provide that

distance for zeroing, and it's easy to spot the shot fall from there or just walk up and look!

[dadioles 68]

The only thing about using a 'near zero' is that it does not show much of an error. It is, however, good for a quick check.

 

You can only zero accurately at true shooting distances.

 

Zero could be chosen by the distance that you most frequently shoot or perhaps (with reference to a trajectory graph) to whatever gives you the flattest shooting.

 

There are no rules. It is whatever distance suits you, your rifle and ammunition, your target or quarry.