Superglide
Regular
- Location
- somewhere with a lot of standoff
For those of you out there with a new Redfield with the Accu-range reticule but have a 308 win and realized their is no listing for it, or others just wondering where and what the hold overs in the scope are based on here it is. First off I am shooting a Marlin XS7 308win with a Redfield 3x9x40 with Leupold rings and it has been bedded on a Boyds classic nutmeg laminate stock. This rifle’s primary function is hunting, so my ammunition of choice is Federal Fusion 165gr, but I do enjoy grouping and shooting out to 450-500 meters with this rifle to prove to myself that the hold overs and math does work! I contacted Leupold about the fact that they do not have 308 win listed on the bullet chart for the Redfield Revolution scope, so they sent me the math that breaks down how to use the Accu-range reticule. It is by no means super precise but it is a starting point and with a little research, math and range time (like any rifle and scope setup) you will have some pretty solid hold over points.
With a 200-yard zero (center of the crosshair) and that document (found on the intruction manual that comes with the scope, or if you have lost that it is on the redfield website) list the holdover subtensions of the Accu-range 3-9x at High Power (9x) below the center as 2.19 MOA (300 yds), 4.80 MOA (400 yds), and 7.82 MOA (500 yds). An MOA represents 1.0476" at 100 yards, and the math for these drops in inches at those distances is as follows: 300 yds (2.19 MOA x 1.0476" x 3 = 6.88"); 400 yds (4.80 MOA x 1.0476" x 4 = 20.11"); 500 yds (7.82 MOA x 1.0476" x 5 = 40.96"). Match that ballistic path with the long-range (200 yd zero) charts supplied by ammo manufacturers for your cartridge. You should find a load that comes close to those drops, or at least help you figure what the actual holdovers on the Accu-Range reticule represent for your load.
I know some people are thinking “great, yards again! All the ranges in Canada are in meters” well being that I am a good Canadian and use the metric system here you have it.
With a 200-Meter zero (center of the crosshair) and that document lists the holdover subtensions of the Accu-range 3-9x at High Power (9x) below the center as 2.19 MOA (300m ), 4.80 MOA (400m), and 7.82 MOA (500m). An MOA represents 1.02362" at 100m, and the math for these drops in inches at those distances is as follows: 300m (2.19 MOA x 1.141" x 3 = 6.725"); 400m (4.80 MOA x 1.141" x 4 =19.653"); 500m (7.82 MOA x 1.141" x 5 = 40.022"). Match that ballistic path with the long-range (200m zero) charts supplied by ammo manufacturers for your cartridge. You should find a load that comes close to those drops, or at least help you figure what the actual holdovers on the Accu-range reticule represent for your load. Some ammo manufacturers only list their ballistics in imperial measurements (Federal fusion being one of them) so you will have to do a little extra math, but the charts still work.
So for my rifle the ammo choice is 308win Federal Fusion 165gr, if I use the math provided and ballistic charts provided by Federal, My holds are as follows. Center of crosshairs is a 200m zero, the first hold at the bottom of the circle is 279m, the second hold at the dot is 384m and the third hold at the tip of where the crosshairs get thick is 475m. I have tested these holds and I was able to hit 9 inch steel targets out to 475m with no trouble.
All of this math and theory can be applied to any bullet. I figure if I have this reticule I might as well try and make it work!
With a 200-yard zero (center of the crosshair) and that document (found on the intruction manual that comes with the scope, or if you have lost that it is on the redfield website) list the holdover subtensions of the Accu-range 3-9x at High Power (9x) below the center as 2.19 MOA (300 yds), 4.80 MOA (400 yds), and 7.82 MOA (500 yds). An MOA represents 1.0476" at 100 yards, and the math for these drops in inches at those distances is as follows: 300 yds (2.19 MOA x 1.0476" x 3 = 6.88"); 400 yds (4.80 MOA x 1.0476" x 4 = 20.11"); 500 yds (7.82 MOA x 1.0476" x 5 = 40.96"). Match that ballistic path with the long-range (200 yd zero) charts supplied by ammo manufacturers for your cartridge. You should find a load that comes close to those drops, or at least help you figure what the actual holdovers on the Accu-Range reticule represent for your load.
I know some people are thinking “great, yards again! All the ranges in Canada are in meters” well being that I am a good Canadian and use the metric system here you have it.
With a 200-Meter zero (center of the crosshair) and that document lists the holdover subtensions of the Accu-range 3-9x at High Power (9x) below the center as 2.19 MOA (300m ), 4.80 MOA (400m), and 7.82 MOA (500m). An MOA represents 1.02362" at 100m, and the math for these drops in inches at those distances is as follows: 300m (2.19 MOA x 1.141" x 3 = 6.725"); 400m (4.80 MOA x 1.141" x 4 =19.653"); 500m (7.82 MOA x 1.141" x 5 = 40.022"). Match that ballistic path with the long-range (200m zero) charts supplied by ammo manufacturers for your cartridge. You should find a load that comes close to those drops, or at least help you figure what the actual holdovers on the Accu-range reticule represent for your load. Some ammo manufacturers only list their ballistics in imperial measurements (Federal fusion being one of them) so you will have to do a little extra math, but the charts still work.
So for my rifle the ammo choice is 308win Federal Fusion 165gr, if I use the math provided and ballistic charts provided by Federal, My holds are as follows. Center of crosshairs is a 200m zero, the first hold at the bottom of the circle is 279m, the second hold at the dot is 384m and the third hold at the tip of where the crosshairs get thick is 475m. I have tested these holds and I was able to hit 9 inch steel targets out to 475m with no trouble.
All of this math and theory can be applied to any bullet. I figure if I have this reticule I might as well try and make it work!
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