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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Figuring Muzzle velocity
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<blockquote data-quote="Moman" data-source="post: 260809" data-attributes="member: 10494"><p>Davey, see if this helps. Enter the data as accurately as possible into Exbal. Be as accurate as you can with this including all of the atmospheric data. Then, shoot a 3 shot group at a known distance, for me this was 675 yds. It's best if you shoot at a target or marked plate so you can identify and measure your POI. At this point, you want to measure your POI to see how low or high you were at this known range. Take the 3 shot average. Now, go back into Exbal and click Options, select Trajectory Validation. A box will open up with several small boxes inside it. You will be working off of the top row of three boxes. In the left box, enter the exact range you were shooting at, get this info from your laser rangefinder. In the box to the far right, enter either a + or - (for high or low) along with the exact measurement of how many inches low or high the average shot is for your group. For a 4 " high shot, this would look like this; +4. At this point, select calculate, then select apply. This will validate your drop sheet for this round. You will notice that it will automatically update all of your drop figures throughout the chart.</p></blockquote><p></p>
[QUOTE="Moman, post: 260809, member: 10494"] Davey, see if this helps. Enter the data as accurately as possible into Exbal. Be as accurate as you can with this including all of the atmospheric data. Then, shoot a 3 shot group at a known distance, for me this was 675 yds. It's best if you shoot at a target or marked plate so you can identify and measure your POI. At this point, you want to measure your POI to see how low or high you were at this known range. Take the 3 shot average. Now, go back into Exbal and click Options, select Trajectory Validation. A box will open up with several small boxes inside it. You will be working off of the top row of three boxes. In the left box, enter the exact range you were shooting at, get this info from your laser rangefinder. In the box to the far right, enter either a + or - (for high or low) along with the exact measurement of how many inches low or high the average shot is for your group. For a 4 " high shot, this would look like this; +4. At this point, select calculate, then select apply. This will validate your drop sheet for this round. You will notice that it will automatically update all of your drop figures throughout the chart. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Figuring Muzzle velocity
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