Post by: 7mmfan on November 21, 2016, 09:20:15 AM
1. I need to run my load through a chrono so they can set up the turrets with the correct load data.
2. I need to measure the distance from the center of the barrel to the center of the scope.
I don't have a chrono, so if anyone in the Marysville area has one and wouldn't mind meeting up with me to do a little shooting, I'd sure appreciate it.
I'm also not sure how to go about making the measurement from the barrel to the scope. Anyone have any experience with this?
Post by: BULLBLASTER on November 21, 2016, 12:55:10 PM
As for a chrono I'm too far away.
Post by: Stein on November 21, 2016, 01:52:51 PM
For a velocity, I would go to the range, shoot known distances and then calculate velocity with the online tools. Much more accurate than any chrono you are likely to get your hands on.
Post by: 7mmfan on November 21, 2016, 02:00:59 PM
I used micrometers to get the distance between the top of the bolt and the bottom of the scope. Then, measure the scope tube diameter and bolt diameter and a little math gives you an accurate measurement.
For a velocity, I would go to the range, shoot known distances and then calculate velocity with the online tools. Much more accurate than any chrono you are likely to get your hands on.
Explain this to me.
Post by: JDHasty on November 21, 2016, 09:23:46 PM
I used micrometers to get the distance between the top of the bolt and the bottom of the scope. Then, measure the scope tube diameter and bolt diameter and a little math gives you an accurate measurement.
For a velocity, I would go to the range, shoot known distances and then calculate velocity with the online tools. Much more accurate than any chrono you are likely to get your hands on.
Explain this to me.
That depends on the accuracy of your rifle and how well you can shoot it. You use drop at various ranges to calculate velocity along the way, but that means shooting out to fairly significant range. It is quite a process to do it right and your ranges have to be very accurately surveyed or your calculated MV will be off.u
I'm sure someone up there has an Oehler that will set it up for you and that will give you an accurate reading that will be more than reliable.
Post by: Reidus on November 21, 2016, 09:43:25 PM
Post by: Reidus on November 21, 2016, 09:45:17 PM
Post by: actionshooter on November 21, 2016, 10:06:10 PM
for the scope height, I measure as indicated above
Post by: 7mmfan on November 22, 2016, 09:27:56 AM
I'm sure I could figure out the velocity based on bullet drop now that I see the process you're talking about. I think I'd rather just round up a chrono. Good advice though.
Post by: BULLBLASTER on November 22, 2016, 10:33:19 AM
:yeah:I used micrometers to get the distance between the top of the bolt and the bottom of the scope. Then, measure the scope tube diameter and bolt diameter and a little math gives you an accurate measurement.
For a velocity, I would go to the range, shoot known distances and then calculate velocity with the online tools. Much more accurate than any chrono you are likely to get your hands on.
Explain this to me.
That depends on the accuracy of your rifle and how well you can shoot it. You use drop at various ranges to calculate velocity along the way, but that means shooting out to fairly significant range. It is quite a process to do it right and your ranges have to be very accurately surveyed or your calculated MV will be off.u
I'm sure someone up there has an Oehler that will set it up for you and that will give you an accurate reading that will be more than reliable.
Then you'd be assuming the ballistic coefficient of the bullet that is published is accurate as well.
As stated a good quality chrono will be much easier gen you can validate the trajectory at longer range.
Post by: 7mmfan on November 22, 2016, 11:08:03 AM