Thread: Seating depth - who bothers?

A tho of an inch is bigger than 0.01mm

That's just how you do it lol
Engineering is different. You USE it daily. A normal world person prob wouldn't

We rebuild a bunch of American and English equipment where the manual specs are imperial (thou). Getting less and less now though.

1 Thou is 0.025mm approx

in that case we use small incriments but we only use metric to do it if thats the pointim no genius

The concord was an imperial / metric master piece. Half French and half English and it flew fairly fast,high and hot

I do what cam does load 5thou off lands an ladder for pressure them change jump to tune load. An if I have to make jump big ish them I up charge again with ladder.

sent from my Samsung s3 using tapatalk 2

normally I try to seat one caliber depth into the case especially if the rifle has a long throat like the ex military 6.5x55's then work up an accurate load for the rifle generally works for me rather than chasing optimum seating depths unless the one caliber depth trick does not work.

NFT, thats very common

Yep you won't get to the lands with pointy pills and still fit the mag in a lot of rifles.
Try max mag fit length load a few up and shorter in say .2mm steps and hopefully one will stand out as a shooter. Of course it just might not like them.

Sent from my GT-S5360T using Tapatalk 2

I used to load 20 thou off and do groups then pick the best and tweak the distances to the lands..... Now I load to mag length or off the lands and do a a few groups... then if it doesn't work I may play with distances but I haven't needed to since I found I get great results from using using a bump with a shell holder to suit the head space and Collet die for the neck

By jamming, on and off the lands, are you not changing the pressure, which you can also do by picking a set length and playing with powder?
Just putting it out there

Originally Posted by Spanners

By jamming, on and off the lands, are you not changing the pressure, which you can also do by picking a set length and playing with powder?
Just putting it out there

True, but is pressure the only factor that affects accuracy?

Prob not. All a black art, and one of the few things in life that can't be quantified exactly.
I'd say harmonics being the main part.

Originally Posted by Spanners

Prob not. All a black art, and one of the few things in life that can't be quantified exactly.
I'd say harmonics being the main part.

and My SAUM harmonics are affected more by head space than distance ti the lands it appears going by results so far

I never jam as I never want a loose pill being left in there when a shot is not taken and you extract and powder every where