How is scope height measured

If your scope has a 30mm scope tube, add 15mm to the combined height of the scope ring and base to determine if it's greater than your scope height measurement.

These methods of measuring scope ring height do not take other factors into consideration, such as bolt action clearance, or the presence of open sights and other accessories. Always add extra space for these situations. Follow us on Facebook. Newsletter Ok. How do I measure my scope height? Most rifle scopes are identified by several numbers in the following format: [minimum magnification] - [maximum magnification] x [objective lens diameter in mm] To get a rough measurement of scope height, just take the objective lens diameter usually measured in millimeters , add mm for the thickness of the scope body, and divide the result by two to determine the scope height.

To convert from inches to millimeters, multiply your measurement by Choosing the right base This is easy compared to ring selection, because most ring manufacturers will make only one specific base for your receiver. Choosing the right rings If you know your scope height, you know the minimum height that the centerline of the scope must sit above the receiver. Measuring ring height Ring heights vary from manufacturer to manufacturer.

Method 1: Measuring from base to ring center If your chosen manufacturer uses this method of measuring their rings, then this part is easy.

Add all 3 resulting numbers together to get your sight height. Reactions: tnc. Oct 27, 59 www. I use calipers from the center of the brl to the split in the scope rings. Dec 29, Texas. Reactions: hrt4me. Click to expand AMGtuned Just white trash with money May 6, 1, Maine. I was just about to post a similar question. I use Strelok Pro. I have always entered 1. Their height from top of rail, to centerline, in my case with 30mm, is 1.

Please correct me if I am wrong. So, I have been thinking; and where it asks for "scope height", I'm assuming that is height over bore since we are using the app for bullet trajectory, and bullet leaves bore center , and I should add the 1.

Final height being 2. Am I correct in this thinking? Dec 6, AMGtuned said:. Reactions: AMGtuned. Deleted member Guest. Dec 29, So Cal. Culpeper said:. Reactions: Forrest84 and Deleted member Aug 30, 66 Wheatland, Wyoming. Dave grew up in the southeast highlands of Idaho on the western slope of the Rocky Mountains.

He was strongly influenced by his dad, a lifelong outdoorsman who brought him along on hunting trips. He began shooting. At 13 he got his first deer rifle and first mule deer in the same month. The next year he got his first shotgun and first ruffed grouse.

He's often roaming the Portneuf Range and Caribou-Targhee National Forest camping and hunting game to fill the freezer. Getting it done right the first time will save you a lot of headaches. My very first tip is to buy new rings. Get yourself some new bases that correspond to the type of rings you want, and try to match the brand on your rings and bases for the best fit.

Dovetail mounts can only use dovetail rings, but Weaver and Picatinny rails can take Weavers. The easiest way to go is dovetail for dovetail, otherwise, check if your mount is a Weaver or Picatinny rail. In that time, I saw just about everything I could imagine being done wrong come across the workbench, including upside down and backwards seriously. When the scope is mounted too high, it can cause a variety of issues. You have to take a really awkward position to get a sight picture, and that improper posture results in more felt recoil on your shoulder.

Unnecessarily high scopes will also suffer eventual damage or failure from that extra recoil. The most common issue we saw come through the doors was scopes that were just mounted too low. In the shop, measuring scope height was mostly done with eyeballing, prior knowledge, familiarity, and a little trial and error.

If we picked the wrong scope ring height , it was obvious as soon as we set the scope into the bottom of the rings.

The only way for online shoppers to have that option is to buy a whole slew of rings, find the ones that work, and return the rest. With a bolt-action, you also have to watch out for clearance on the bolt handle. The most accurate way to get a measurement for firearm-related work is to use calipers. Unfortunately, many companies measure their scope ring height in a variety of ways. There are two most common ways that manufacturers measure scope height:. There are several formulas for how to measure sight height that will give you very close results.

You will still have some other considerations, though. Bull barrels and other heavy target barrels or AR flat-tops will change things.