overall length gauge
- Thread starter Grizzlypeg
- Start date
I think you may be referring to a bullit comparator,used with a measuring caliper for overall length off the ogive,handy for polymer tipped bullits.Hornady Lock N Load with 6 common caliber inserts in a kit,including yours,about $40.00.I believe it used to be Stoney Point.
Yes, I may be incorrectly describing what I want to acheive. Measuring the tips of the say 224 69gr hollow point bullets is an inconsistent point for comparison. As are the polymer tips I use on my 300WSM. I was looking for something I can make a measurement from, so that when I find an ideal length, I can repeat it, and ensure quality control.
You mean like this?
http://www.sinclairintl.com/.aspx/pid=34262/Product/Sinclair-Hex-Style-Bullet-Comparators
Won't give you OAL but will give you a reference point.
http://www.sinclairintl.com/.aspx/pid=34262/Product/Sinclair-Hex-Style-Bullet-Comparators
Won't give you OAL but will give you a reference point.
ultimate_monkey
CGN Ultra frequent flyer
- Location
- victoria BC
yes, your talking about a bullit comparitor... its used to messure from the cartrage base, to the ogive of the bullet.
on OAL guage, will messure yyour chamber and tell you the absolutel longest you can have your COAL from base to where the ogive touches the lands
I am thinking you want the hornaby bullet comparator. Ties into your calipers and measures from where the ogee (or something like that) or where the shoulder of the bullet contacts the barrel opening. It's a nice tool, and just make sure the kit comes with your caliber.
I use the above in conjuction with the Hornaby OAL guage, and with this you need the buy the shell, in the correct caliber ... for it screws onto the oal. This tool is useful for dertermine ideal OAL for you can determine exactly where the shoulder of the bullet contacts the opening of the barrel. I have found this handy at times.
I use the above in conjuction with the Hornaby OAL guage, and with this you need the buy the shell, in the correct caliber ... for it screws onto the oal. This tool is useful for dertermine ideal OAL for you can determine exactly where the shoulder of the bullet contacts the opening of the barrel. I have found this handy at times.
As mentioned above, you want an OAL guage and comparator, so you can accuaratly measure how far off the lands you make your rounds. For the OAL guage you can make your own cases to fit on it for each caliber, but the thread they use is very oddball. I bought the correct tap from the US.
Someone mentioned the caliper.
You can stand your rifle on it's butt and place a loaded cartridge with the bullet in the barrel.
Use the prong on the end of the caliper to measure from the base of the cartridge to the end of the barrel.
If you can allow, or measure, the depth of the crowning of the barrel, you will have a very close measurement on where to seat that bullet to just touch the lands.
Personally, I wuldn't do it that way.
I would take an empty case, with the neck squeezed down just enough make resistance in a bullet.
Push the bullet a bit into the neck of the case. If it is a controlled feed action, remove the bolt and place the case in the the extractor. Carefully replace the bolt and slowly close and lock the bolt. The bullet will now be seated to adepth that just touches the lands.
Go from there, in however you want to measure it.
Last edited:
Cameron SS
CGN Ultra frequent flyer
- Location
- Ground Zero
a regular dial or digital caliper will be useful for overall length measuring, which is still important of fitting into a magazine is important. But you definitely want something that measures bullet seating depth as measured off the bullet ogive. Some bullet brands are more consistent base to tip then others, but in general o-give measurements are better still. Sorting your bullets before hand helps too. The hornady bullet comparator set gets my vote as well. The donut attachments as someone mentioned which go on the calipre are probably the cheapest and most broadly useful. Redding and Sinclair make their own versions, check sinclair International to see which one is cheapest this week. they are all the same.
You will probably want to do some research on ogive measuring in general. There is a bit of a learning curve with calibrating your dies, which may or may not seat at a different point in the ogive as measuring device.
RCBS Precision mics are pretty handy, as they measure a bunch of useful things, however, they are expensive, and cartridge specific. If you have one favourite cartridge that you load, it may be worth your while. But if like most, you reload for many calibres, it isn't really practical to buy a bunch of them.
Just my $0.02
