sparrow123
Well-Known Member
Morning all. What would I be best to zero 308 150g bullet at .
1” high or more it’s 20” barrel. Thanks.
Shoot to about 200m
1” high or more it’s 20” barrel. Thanks.
Shoot to about 200m
308 100m zero.
- Thread starter sparrow123
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long_range_rob
Well-Known Member
Zero at 100 exactly and high shoulder aim for 200 for the 4” drop.
sparrow123
Well-Known Member
Thankyou 
1" high @100m makes most sense for me, zeroed at roughly 170m and 2"? low at 200m.
sparrow123
Well-Known Member
Why would it be like you shot say 50m away with 1” high
Heym SR20
Well-Known Member
Most deer stalking cartridges are pretty similar in terms of trajectory. You need to look at your own ammo and its data, but in practical terms there is little difference.
Two options:.
Look at the ammo data. I am using a 7x65r with a 140gn bullet at 2900 fps so the figures are from back of my ammo box.
About 4cm high or an inch and a half high at 100m will give a point blank range of about of 188m. And 10cm low at 250.
In practice this means that bullet will be within 3 to 4cm high or low out to a touch over 200m. So a centre of body hold on a deer and its dead.
Zeroing at 100m means that you are bang on at 100m. But your drops at 200m is getting on for 10cm and 20cm at 250.
It really depends on your own choice. I much like point blank option, its simple and I don’t need to worry about range, but I keep my shots with 200 or so.
Many, especially those who come from target shooting, with turrets etc prefer 100m and then dial fir the longer shots. This can give you more precision, but also plenty of scope for dumfuckery - forgetting to dial, not returning to zero stops etc etc.
Two options:.
Look at the ammo data. I am using a 7x65r with a 140gn bullet at 2900 fps so the figures are from back of my ammo box.
About 4cm high or an inch and a half high at 100m will give a point blank range of about of 188m. And 10cm low at 250.
In practice this means that bullet will be within 3 to 4cm high or low out to a touch over 200m. So a centre of body hold on a deer and its dead.
Zeroing at 100m means that you are bang on at 100m. But your drops at 200m is getting on for 10cm and 20cm at 250.
It really depends on your own choice. I much like point blank option, its simple and I don’t need to worry about range, but I keep my shots with 200 or so.
Many, especially those who come from target shooting, with turrets etc prefer 100m and then dial fir the longer shots. This can give you more precision, but also plenty of scope for dumfuckery - forgetting to dial, not returning to zero stops etc etc.
Should be dead on around 50m or so. Put all the details, including your scope height, into a ballistic calculator to get an idea. It doesn't do any harm to actually check how the rifle shoots at different ranges.
Heym SR20
Well-Known Member
it will be pretty much be zeroed, but depends on cartridge, scope height etc.
Foxyboy43
Well-Known Member
Not a .308 but 6.5x55SE in two 5 shot groups.
As noted on photo - 130gns Sierra TGC over 45gns N160 shot at 50 metres. I use this photo as a handy way to confirm my 100 and 200 zeros at the club’s 50m range and have the turret dial marked for each. Someday I will do the same for 300…..
As noted on photo - 130gns Sierra TGC over 45gns N160 shot at 50 metres. I use this photo as a handy way to confirm my 100 and 200 zeros at the club’s 50m range and have the turret dial marked for each. Someday I will do the same for 300…..
Because of MPBR. At 50m your POI and POA will coincide. 1 inch high at 100 yds is a very effective approach to zeroing a stalking rifle.
Regards
JCS
Dialling for deer? Why?Not a .308 but 6.5x55SE in two 5 shot groups.
As noted on photo - 130gns Sierra TGC over 45gns N160 shot at 50 metres. I use this photo as a handy way to confirm my 100 and 200 zeros at the club’s 50m range and have the turret dial marked for each. Someday I will do the same for 300…..
View attachment 393196
Regards
JCS
Foxyboy43
Well-Known Member
Silly JCS!
Dialling (all 2 marks for it) for targets - one club has 50m (Saturdays) only the other (Sundays) has 100 out to 600….
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half-baked
Well-Known Member
Takbok wrote it out well, and Heym SR20 elaborated quite nicely.
Heym SR20
Well-Known Member
That is precisely the whole of max point blank range zeroing. A 50m is a very useful check zero, but if its a bit high a bit low at 50 the effect down range is magnified somewhat.
The 4cm high at 100m is a very good compromise that has stood the test of time. 100m is close enough to allow good grouping, minimal effect of wind and 100m is a pretty easy distance to find a clear horizontal space with a good back drop.
And 4cm for the 243, 308 etc is the distance from base of the cartridge to start of the shoulder so you have easy measuring device in your ammo.
The full length 270, 30-06 7x64 etc, the shoulder is at about 5cm. And 223 case length is 45mm.
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sparrow123
Well-Known Member
A thinks that’s what al do
thankyou
Stalker62
Well-Known Member
Heym SR20
Well-Known Member
Thats the ideal, but an awful lot of stalkers do not have easy access to 200m ranges.
Foxyboy43
Well-Known Member
Yep - see my earlier post. When you do have access to 200 and get your rifle zeroed, shoot it again without adjustment at 50 or 100 and take photographs on your phone. Next time you will know where your 200 zero hits at 50 or whatever and you simply adjust to that picture.
Simples.
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