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Posted: 11/12/2009 9:45:43 PM EDT
| Newb question. ok, i know you are suppose to measure bullet seating depth from the ogive. what do you use to measure with? using just regular dial calibers would be way to inaccurate. also if the manuals list COL at 2.250 how do i figure out what it should be at the ogive? |
| I don't measure off the ogive. Been reloading for 24 yrs. I do make dummy seating rounds set to a specific depth according to the rifling of individual rifle/bullet combinations. I use that exact bullet to make the seating round. Has always worked for me. Pistol bullets are set using the COAL from the manual as a guide and go more for function than anything else for an individual gun. Considerations are made for those to be used in multiple pistols. |
| You can purchase a comparator set from Hornady but it is an expensive set. I purchased one for around $150 with the all the little extras, but then add in the modified casings you need and it gets a little pricier at $5-8 per modified casing. A digital caliper also helps when using this set as you can zero your caliper easier than the dial calipers. Just my 2 cents on it. Look into it for yourself and decide wether you have the need for the comparator set or not. It can be very useful for finding where your rifle likes it's cartridge length at also. |
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Quoted:
Newb question. ok, i know you are suppose to measure bullet seating depth from the ogive. what do you use to measure with? using just regular dial calibers would be way to inaccurate. also if the manuals list COL at 2.250 how do i figure out what it should be at the ogive? Measure with OAL gage such as the StoneyPoint 
or RCBS Precision Mic 
If the manual says "2.250", then seat one to that length, then measure to the ogive with aforementioned tool. That will tell you ogive length for that seating depth. Bullets vary a little in length (base to tip) which is why some measure off the ogive (which is a specific diameter on the bullet's curved surface) You want THAT diameter to be consistently some distance from the rifle's lands. How far ? You won't know till you play with the seating depth to find what YOUR particular rifle likes. (Hint - They're like women....quite particular !) All this is not absolutely necessary unless your bent on getting the most accuracy. There is a point of diminishing returns for each person, depending upon your own personal requirements. |
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