Good fit but close
I use these bullets for African hunting. They are a good fit but on the 270 grain bullet they come to the top of the crimp groove, which is acceptable.
Eliminate the WOBBLE
Previously used the big hex nut with drilled holes for different calibers. Fought the WOBBLE all the time. This comparator insert is so much easier to use for measuring cartridge base to ogive of the bullet. Very important for accurately setting your cartridge overall length. I am a high country Mule Deer hunter but also enjoy long range target shooting.
Well built and accurate
I reviewed this item back in Jan 2015. However, I had just read that the manufacturer had some quality control issues back then, but these have been corrected, so I decided to give these another try. These new ones are much better than before, and hold the bullet securely at the ogive, or the pressure ring on the base by the boat tail. I ordered 2 to get readings on the bearing surface for different bullets, and I get accurate, repeatable readings every time. I have them in the Sinclair body. Since they are cut with a chambering reamer, the bullet fits securely in the insert. In my Hornady insert, the bullet will "wobble" since the insert is cut straight, and you have to make sure it goes on straight on the caliper. This inserts are made of high quality material, and are a must for competitive long range shooters.
works for me
I have three different bullet comparators in 22cal, all three measures the ogive at a different point on the bullet. The Sinclair is the best it repeats, and is made of stainless steel so it will not change in time. If seating the bullets deep it maybe a problem it has the largest hole of the three comparator I have . This comparator works great for me.
you get what u pay for
Excellent quality - much better than the competition - made of steel - much better that aluminum. Thanks Sinclair!
Great little tool
I bought this comparator to use with the Sinclair XL Comparator body. It fits like a glove and gives accurate measurements from the ojive of the bullet to the base. Buy two of them and two bodies and you can also measure bearing surface of the bullet. I would definitely buy it again.
Nice heavy steel, not aluminum
Used with the Sinclair comparator body and a caliper to check OAL (base to ogive or datum point) on the bullet. Easy to use with repeatable results. Get two comparators with inserts and length sort the bearing surface area of bullets to help improve accuracy.
Improved design for comparator inserts.
Measuring with a tapered comparator is much easier than with a 90 degree edge at the end of a straight hole. Using this insert with the Hornady LNL OAL tools yielded consistant readings on each test. No need to take multiple readings and find the average. A second reading to verify the first and your done. There is one difference though. Getting a reading is quickly done, but if you apply mild pressure and wait a bit you can watch the number go about .002 lower. It feels like your squeezing the air out from between the bullet and comparator surfaces. A tap on the side of the bullet's base is needed to release it from the insert. Rest assured, the insert left no marks on the bullets I measured. This review covers the 6mm insert used to measure 8 different bullets, 80 to 106 grains, by Berger, Sierra and Lapua.
Taking a Punt
I am topping up Comparator inserts for my SInclair body, I have some of the old ones that just have a straight hole in them. They work just fine as long as you are really square with the caliper jaw. I am hoping that I will not run into the "too much taper" problem that others have mentioned but that can possibly be fixed by removing material from the face of the comparator body and allowing the body to engage the ogive before contacting the case mouth... We will see!
OK fit with a little wobble
I mostly hunt but I like a 1 hole group at 100 yards with 5 shots. These comparators are good but have a little wobble. Construction will outlast me.
