F T/R Competition F Class 168 SMK / seating depth, bullet weight variations, seating depth ?

[wayno1]

REM700 PSS 1/12" .308 about 25 years old, less than 50 rounds through it.

Using once fired brass from another .308. FL resize to specs and will fit in a Dillon .308 cartridge gauge.

Am trying to read a lot about accuracy reloading. Maybe am reading too much.... working up load for F Class T/R

Separating bullets by weight. For a 168 grain SMK should I bother at all? Separate by .1, .2, .3 grain difference?

If I am working at 'ladder loading' do I have to keep those bullet weights the exact same if possible?

Will start with 41.0 of Varget, Fed Match BR primers per manual for 168grain SMK

OAL I have an RCBS micrometer. Several on the forums here have said start .010 off the lands and I have a way to accurately measure that.
Should I start with any lower load due to a change in the Sierra Book from the published 2.80" OAL

Thanks to all!

Wayne

I realize this is a lot in a short post, but

 

[wilecoyote]

if you're working on a ladder test, my understanding is that that's begins with a C.O.L. at the maximum allowed from your chamber, a.k.a. touching tha lands, anyway

 

[wayno1]

if you're working on a ladder test, my understanding is that that's begins with a C.O.L. at the maximum allowed from your chamber, a.k.a. touching tha lands, anyway

Ah, see I didn't read enough. Thanks!

 

[wilecoyote]

Should I start with any lower load [/QUOTE]
the reason to start with the lowest load is that, being the bullet seated as long as possible, we must consider the growing of pressure spikes_during the ladder test, increasing GRADUALLY the powder charge will allow to see when, ever touching the lands,your chargin'recipe will start to become too much hot_

 

[TunTav0321]

The Sierra Match Kings are pretty good on weight, however I can say this. The further out you shoot the bigger very small differences become. I sort my bullets by weight simple because it makes me feel better. The one place you are best served in sorting bullets is the distance from the Ogive to the Base of the bullet. This measurement in long distance shooting is very important I feel.

I also like to engage my bullets into the rifling, I do this because it works for me. I also shoot very light neck tension, and neck tension can and well make or break a long range load. My neck tension is just .0005 I soft seat my bullets and let them seat themselves in to the rifling. Being consistant is crtical and this for me has shown to be the most consistant.

Roland

 

[wayno1]

Thanks!
Sounds like advanced loading principles to me! Will keep this in mind when I get to that point.
I'm lucky at my stage of developing a load to make sure the cases are sized to fit in a full length case gauge, meet the minimum OAL case length per spec, set up a reasonable load and keep the load from getting too hot!

 

[wayno1]

Thanks!
Sounds like advanced loading principles to me! Will keep this in mind when I get to that point.
I'm lucky at my stage of developing a load to make sure the cases are sized to fit in a full length case gauge, meet the minimum OAL case length per spec, set up a reasonable load and keep the load from getting too hot!