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    Senior Member amadeus76's Avatar
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    POA / POI?

    When zeroing a Swissicon 1911 long rifle is the point of aim centermass or 6 o’clock hold?

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    Contributing Member CINDERS's Avatar
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    Set your sights for the known range say they go to 200 at the lowest then have a crack at a target at that distance or you could try it at a 100 but you would have to know a few things the bullets velocity - bullet B.C - Mid range trajectory of the round so you could calculate it back to where the bullet should strike the target above the POA.

    Now the easy bit put a target at 100 & shoot at it using the two holds 6 & center mass & go from there its allot harder today to get it correct to match the sight ladder because the B.C's are better so the bullet flies flatter meaning you have to use a higher range setting on your sights to get the POA/POI to correlate.
    Best thing is range time at all the distances you shoot over and note down the sight setting (D.O.P.E)for every range for that load your using just like we all had to do I have notes on all my rifles.
    Change the load your back at it but with the settings already known adjustments are only minor either way dependent on just how much you vary the powder load if you change the powder then you need to start again as the burn rate may be different and may induce a different harmonic in the barrel basically just go out and shoot and see what happens. There is nothing wrong with range time and burnt gunpowder with a few mates............
    Last edited by CINDERS; 05-20-2018 at 01:22 AM.

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    Contributing Member speckles's Avatar
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    I am 6-8 inches high at 100 yards with my G1911. My point of aim is interface between black and white of 12 inch shoot and see at 6 o'clock .. that puts me slightly over the bullseye. depending on the day I am closer if I drop an inch off the bottom of target. I use GP11

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    Contributing Member Ovidio's Avatar
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    Same as with my K31icon with my reloads.
    I like it because it allows me to aim with 6’clock hold at 100 meters with the standard 16” target.
    They land in the bullseye (if I make my part).
    34a cp., btg. Susa, 3° rgt. Alpini

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    Senior Member RC20's Avatar
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    If it helps, Military rifle came with a "battle sight" setup. The idea was to be able to aim at an enemy midpoint and with the 30-06, it was something like 500 yards that you would hit them head to toe regardless of the range.

    Have to do a bit of sleuthing, not sure what the GP11 type guns were set at and maybe changed from 1911 to the K-31.

    In reality, the average shooter would miss anything at 500 yards anyway. Most combat is 300 yards or less. Iron sights at 2500 the 30-06 and 1917 could do (theoretically) forget it.

    Sure the trained marksmen could make them do that, average guy, good grief charley bronw. But that was "doctrine"

    Simple is best and aim at the bottom of the black ball. Make the ball bigger or smaller to get POI where you want it.

    1903 had a sliding sight for "accurate" it really sucks. 1917 had a raised peep sight that was very good actually. The lay down peep was 450 yard or some such battle sight.

    A good shot could do things with a 1917 that you normally could not do. Sgt York being a case in point.

    I found this on the sight.

    he standard K31 iron sight line elevation concept is somewhat unconventional and designed for center hold (point of aim = point of impact) at the 100 m (109 yd) and 200 m (219 yd) meter settings with GP11 ammunition. Starting at 300 m (328 yd) and more distant ranges the shooter should aim below the bottom of the target, so that the front sight's post is just out of the way.[4] The 6 o'clock hold is intended for target shooting at 300 m (328 yd), meaning the sight line is designed to let GP11 ammunition hit 30 cm (11.8 in) over the point of aim on a 60 cm (23.6 in) diameter bulls eye the Swissicon military and shooting clubs used for sighting in the K31, marksmanship training and competitions. A 6 o'clock hold is only good for a known target size at a known distance and will not hold zero without user adjustment if these factors are varied.[5] Combined with GP11 ammunition the 300 m (328 yd) and 400 m (437 yd) settings can alternatively be used as center holds for 400 m (437 yd) and 500 m (547 yd).
    Last edited by RC20; 05-22-2018 at 05:03 PM.

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    Contributing Member CINDERS's Avatar
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    The longer range settings like the 2000 on the 303's was a carry over from earlier conflicts where a beaten zone was wanted at extended ranges without the aid of a heavy automatic weapon like a Hotchkiss 1 pdr I have read the tests conducted by the UKicon and it is quite interesting with say 50-100 men all firing at the same time at a distant target infact they even tested it for over the hill plunging fire.


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