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No4 Mk1 standard sights

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Honkytonk View Drop Down
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    Posted: November 27 2021 at 11:36am
Question. If the rear ladder/battle sites are calibrated to a specific distance, why would one need to have the ability to change the front blade sight heigth?
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Zed View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Zed Quote  Post ReplyReply Direct Link To This Post Posted: November 27 2021 at 12:31pm
The actual calibration of each rifle is adjusted on the front sight.  Both windage and basic elevation. As all of these rifles were hand built, there would be minor differences; which is why they would be set up individually to bring them into required specification.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: November 27 2021 at 3:40pm
Zed gave a good explanation.  The rear sights are all the the same, elevation marks all at the same vertical position.  So, all individual rifles must be zero’ed by adjusting the front sight height and windage position. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: November 27 2021 at 4:05pm
I have a big head... for some reason, the 300 yd battle site is spot-on @ 100 yds, and I need to set the ladder site @ 250 to be on at 100. It has been this way since I first shot a Lee Enfield in 1972. Am I weird?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Goosic Quote  Post ReplyReply Direct Link To This Post Posted: November 27 2021 at 4:51pm
Not in the slightest HT. To each, his own i say. When I  have used the battle sights I will raise or lower the rear sight until I am zeroed in at 100 yards and then make the necessary changes accordingly for the longer distances. This way I'm not constantly fiddling with front blade heights...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shamu Quote  Post ReplyReply Direct Link To This Post Posted: November 27 2021 at 6:02pm
Different neck lengths, head sizes, & other things , including how, where & how firmly you hold will determine YOUR zero.
Its perfectly normal, another reason why multiple stock lengths sight blades & so on exist.
I remember being fitted for uniforms when I joined the Air force. The No2 "battledress" uniform the "bumfreezer" blouse (jacket) buttons to the pants.
Most have one size for the pants & another for the blouse, so the tailor moves the buttons to fit the button holes.
Mine were all the same & fitted "off the peg", the tailor measured me, looked at me & said:
"You're bloody deformed, mate"!
Even my greatcoat was the same sized fit!
Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Zed Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 4:01am
Also when using the battle sight; are you centering the front sight the same way as when you use the micrometer sight?
Centering the front sight ear's in the dioptre consistently helps with the accuracy. Minor errors here show up as big ones on the target.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 5:02am
Yes, as Zed said.  The battle sight aperture is larger in diameter than the aperture on the moving rear sight slide, so it’s easy to introduce aiming errors with the battle sight.  IIRC, the battle sight aperture is .10 inches in diameter, and later ones are 0.2 inches.  An error of .05 inches in the position of the front sight within the aperture results in a 6 inch change in bullet POI at 100 yards.

I’ll add that the above is why the smallest aperture that allows enough light in to clearly see the front sight and target minimizes aiming errors.  For me, I have found a .05 inch diameter aperture gives best all around results.  If you can keep the front sight position centered within the aperture with an error of no more than +/- 1/8 the aperture diameter (which is fairly easy to detect) aiming errors will be about 1 MOA at most.  This error increases with increasing size aperture.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 5:37am
I do use the from sight ears as kind of a "frame". I also just started using the 6 o'clock aim point.Thanks for the info! 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 8:59am
Actually, further to this. I purchased a No4 Parker Hale aperture site. As our range is only 100 yds, and with the aperture dialed down so low it would interfer with the bolt. I checked and it has a 03 JRS front blade. Im probably 18" low with a six o'clock point of aim, so Im guessing I should install the tallest to give me some room for adjusting up/ down on the rear. Is my thinking correct or am I headed down the wrong path? Thanking in advance!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Goosic Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 9:38am
That 7.62mm No4 barrel I have came with a very tall sight blade. I am also using a stamped metal MkIII rear sight with the main peep being the same diameter as the sliding adjustable peep. The rifle will hit the bullseye @ 100 yards with the slider set at 200 yds as well as just using the main peep sight. With this particular setup, I just aim the tip of the sight at the center of the target foregoing the 6 O' Clock hold. I only did this because I needed the rear main sight to clear the scope and I could not do it using a regular micrometer sight...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 11:20am
Originally posted by Honkytonk Honkytonk wrote:

Actually, further to this. I purchased a No4 Parker Hale aperture site. As our range is only 100 yds, and with the aperture dialed down so low it would interfer with the bolt. I checked and it has a 03 JRS front blade. Im probably 18" low with a six o'clock point of aim, so Im guessing I should install the tallest to give me some room for adjusting up/ down on the rear. Is my thinking correct or am I headed down the wrong path? Thanking in advance!

HT, you might try the rear PH sight set at 5 MOA elevation setting on the scale and see where the bullet Mean point of impact is with a 6:00 hold.  If it still shoots low at that elevation setting, fit a shorter front sight.  

I find I get a better eye alignment with the sights when they are set fairly low.  But it’s also nice to have the rifle shoot to the rear sight elevation settings, i.e. “regulate”.  The PH rear sight should have a sliding adjustable elevation scale, so start with it set about centered in the adjustment slot. Your sight may also have range markings, starting at 200 yds I think.  You could start with the sight set 2 minutes below the 200 yard range mark if your shooting at 100 yards.  Once you have the front sight height sorted out, then you can fine tune the elevation scale markings by adjusting the sliding scale to “regulate” the rifle to shoot at the range marking.  Of course, these scales are set up based on Mk 7 ammunition, so the point of impact will diverge somewhat as you increase range, but not much until past 300 yards. 







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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 11:59am
My most humble apologise! Im shooting "high", not low! Sorry all.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 12:12pm
You will need a higher front sight for sure if the rear sight is down as far as it will go.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 1:31pm
So sorry for the mix up! Agree!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: November 28 2021 at 4:11pm
The principles are the same. 

The front sight you have on the rifle may have been filed down.  Normally it won’t be that far off.  Is the sight a +.03 or -.03?  Can you measure the height from bottom of base to top of blade. 

18 inches at 100 yards is a very large correction, about a .14 inch increase in front sight height, plus some to get the rear sight high enough to not foul the bolt. I would try and find the tallest sight you can. I’ve not seen one taller than +.09 but I think they were made taller than that. 

Which Parker Hale rear sight do you have?  


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