zero scope range
12-14-2008, 06:41 AM
#5
Nontypical Buck
Join Date: Feb 2008
Location: Ohio,mid
Posts: 1,275
12-14-2008, 10:16 AM
#6
Nontypical Buck
Join Date: Feb 2003
Location: Coralville, IA. USA
Posts: 3,802
RE: zero scope range
If it were me, I'd sight in at 2.75" high at 100. According to the ballistics calculator I ran it through, assuming the .308", 180gr flat base PSP has a BC of 0.425, and the scope being 1.5" above the bore, that would give you a +/- 3" max point blank range of 265 yards. The zero would be at 225 yards and midrange trajectory would be +3" at 130 yards, -3" at 265 yards. POI at 300 would be -6.75", which would require hold over. Sighting in as such would give you the most range possible without requiring scope adjustments or holdover.
Mike
Mike
12-14-2008, 01:26 PM
#7
Typical Buck
Join Date: Oct 2006
Location: Person Co. NC
Posts: 884
RE: zero scope range
How long are your shots?
3" high at 100 ought to get youto 300 yards with next to no holdover.
On the other hand, if your shots are usually under 100 yards why would want to be 3" high? Go for a100 yd zero.
Personally I like a 200 yard zero (not 1.5" high at 100, actually shoot at 200 yards
) you might be surprised. Then shoot at 300 and 400 to see what the holdover really is.
3" high at 100 ought to get youto 300 yards with next to no holdover.
On the other hand, if your shots are usually under 100 yards why would want to be 3" high? Go for a100 yd zero.
Personally I like a 200 yard zero (not 1.5" high at 100, actually shoot at 200 yards
) you might be surprised. Then shoot at 300 and 400 to see what the holdover really is.
12-14-2008, 02:16 PM
#8
Typical Buck
Join Date: Feb 2003
Location: Delaware OH USA
Posts: 534
RE: zero scope range
Really depends on your shooting technique, where you hunt and what you are hunting.
IME, Deer are usually a 300 yard max animal. Most 180gr hunting bullets are about .425 ballistic coefficient. Given that, I would sight in at. . .2" high at 100 yards. That is a 200 yard zero. To hit the deer at 300 yards, you would aim over the target point 8.5 in. For a heart shot, that would mean an aiming point 3/4 the way up the deer at 300 yards. I think 90% of the deer I have shot have been 200 yards or less, even in eastern Montana.
My personal hunting rifle is a 300 WSM with a tactical scope(I turn knobs). I sight it in at 100 yards. I add in 2.5 MOA for hunting, effectively giving me a 250 yd zero. With my 190 gr Bergers, I just point and shoot to 300 yards. Over 300, I ALWAYS have time to slow things down, and use my rangefinder, charts, read the wind and make a good shot. Over 300 yards in open country is a long ways.
Even 200 yards is a long shot without a heavy rifle, good scope, good sling and lots of practice. Have the right equipment to go long.
Now, if I am talking about a woods gun, I would sight in at 100 and know my trajectory to 200. I don't think a woods gun will see many shots over 50 yards.
IME, Deer are usually a 300 yard max animal. Most 180gr hunting bullets are about .425 ballistic coefficient. Given that, I would sight in at. . .2" high at 100 yards. That is a 200 yard zero. To hit the deer at 300 yards, you would aim over the target point 8.5 in. For a heart shot, that would mean an aiming point 3/4 the way up the deer at 300 yards. I think 90% of the deer I have shot have been 200 yards or less, even in eastern Montana.
My personal hunting rifle is a 300 WSM with a tactical scope(I turn knobs). I sight it in at 100 yards. I add in 2.5 MOA for hunting, effectively giving me a 250 yd zero. With my 190 gr Bergers, I just point and shoot to 300 yards. Over 300, I ALWAYS have time to slow things down, and use my rangefinder, charts, read the wind and make a good shot. Over 300 yards in open country is a long ways.
Even 200 yards is a long shot without a heavy rifle, good scope, good sling and lots of practice. Have the right equipment to go long.
Now, if I am talking about a woods gun, I would sight in at 100 and know my trajectory to 200. I don't think a woods gun will see many shots over 50 yards.
