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Wouva1 07-02-2013 12:28 AM

RELOADING....confused
 
1 Attachment(s)
I'm a little confused in regards to what's what in regards to OAL for loading 308 168 gr sierra,the question I have is that one book being the Lyman states the seating depth to be 2.775 where as the Richard lee book states 2.800 ,my question is which one is right or it doesn't matter....I'm only new to reloading and am trying to figure things out before commencing my first loads....please check out photos as I will be using IMR-4064.....cheers

Attachment 108530

mountainman13 07-02-2013 12:48 AM

Can't really see the pics. What is your maximum oal?
Both books could be correct assuming everything is withing the tolerances. Your best bet is to aim for the middle ground.

Wouva1 07-02-2013 12:55 AM

From what I gather the .308 win cartridge has a max length of 2.800 and like I said Lyman states seating depth to be 2.775 and the Lee states 2.800,so if I was to keep it in between those two figures I should be right...am I right in saying this or I'm wrong....cheers

Anna_Purna 07-02-2013 12:57 AM

Set it up to the tallest one, load one shell, and then put it in your rifle and see if it chambers and isn't tight to close the bolt. You can color the brass with a sharpie to see if the lans scratch the bullet. if there are marks, seat the bullet down an 8th of a turn, until the marks go away.???

Wouva1 07-02-2013 12:58 AM

Sorry I have made a mistake,max length is 2.810 for .308

Sniper03 07-02-2013 01:05 AM

Wouva,

Nothing to worry about. You are only dealing with .025 which is a difference of only 1/40th of an inch between the two. I would suggest doing as Anna has advised go with the longer. But Lyman is also noted for their quality loading manual as well. You should be fine and if they shoot well just fine tune the powder for ultimate accuracy. Depending on the rifle you are shooting you should get 1/2 or under 1 MOA groups at 100 Yards with it with no problem. If not back the bullet up the .025 to 2.775. I think it will shoot well either way.

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Anna_Purna 07-02-2013 01:06 AM

Quote:

Originally Posted by Anna_Purna (Post 1292513)
Set it up to the tallest one, load one shell, and then put it in your rifle and see if it chambers and isn't tight to close the bolt. You can color the brass with a sharpie to see if the lans scratch the bullet. if there are marks, seat the bullet down an 8th of a turn, until the marks go away.???

You can do the sharpie to several bullets, seating each one and checking for marks. once you have the desired seating depth, go ahead and reseat the previous ones to the new desired depth to make them all consistent.

In any given rifle, there are variances in chamber seating depth. Find what your chamber is with the sharpie method and make that your measurement :)

Axxe55 07-02-2013 01:12 AM

another thing to consider is the max OAL is many times in regard to the magazine length.

a lot of reloaders looking for some additional accuracy will shallow seat their bullets, which sometime makes them too long to load into the magazine, and will shoot them like a single shot.

Sniper03 07-02-2013 01:14 AM

Correction with new specifications .035 difference = 35/1000 of an inch. Still should be no problem but it is not going to cause any situations to be concerned with. If so back it off. Honestly at this point I would try the 2.775 first.

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Wouva1 07-02-2013 01:15 AM

If I was to use the sharpie method would I need to full length size the cartridge first and trim to length or gently seat the bullet into the fire formed brass to find the lands...sorry if some of my questions sound a bit dumb....cheers


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