help with seating depth

Hi Guys

Just having a crack at my first reloads and I think Houston has a problem.

I am loading 150 gr Hornady interlock BTSP into 1x fired Hornady cases. 308 winchester.

Cases have all been full length resized and trimmed to length

I fiddled and created a dummy round in an empty case with COAL of 2.800, saami spec as to start.

When loading live rounds I am getting variation either side of my dummy round. 17 thou under to 6 thou over.

I am measuring with digital callipers from base to tip, I dont have the thingee(technical reloading term) to measure to the ogive

Is it just the variation in the lead tip?

Cheers

Dino

Yes i would assume its tip variation. Plastic tips can have around 6-8 thoug difference at times. Lead nose more although 23 thou is quite a lot. Are you droppibg lever right down each time?

Just measure say 10 projectiles out of the box and see what your length variation is.

Nice inside champfer on the case mouths?
Most of it is probably the lead tip.
I always seat fully back out, turn case a bit and hit it again. I find that helps with consistency and run out.

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Thanks Guys

I have measured 10 factory rounds federal blue box 150s and found a variation of 5 thou

All brass chamfered inside and out, tried to be consistent with that.

Apart from the 1 seated a bit deeper at 17 thou under COAL the rest had a variation of only 5 though so I think that is fine.

Interesting as the projectiles from a sample pack, may have mixed batches in there, i found 1 discoloured projectile 20 thou shorter than rest, reserved now for fouling round.

i loaded 5 from a fresh box and had a variation of 3 though so all good:cool:

cam I seat the projectile 1/2 way drop the ram and turn 180 deg and then fully seat, supposed to like you say help with run out and consistency.

Better day than forecast so off to the range to help put in the new track and then hopefully if the wind does not get up punch some holes in paper.

Will post results from my initial attempts.

Loads of fun so far.

Cheers

Dino

Nice work Dino, no doubt you will have heaps more questions and learning to look forward to.

How did you get on at the range?

Cheers Puku

Mixed results..will post tomorrow after a hunt down the Bluies, actually hoping I can post a report about knocking over a deer..lol

GO the ABs

Cheers

Dino

" I dont have the thingee(technical reloading term) to measure to the ogive"

Easy enough to make Dino, just take a large nut (plenty of them on this forum ;)) about 5/8-3/4"(16-20mm), bore a 3/16" (4.76ish mm)hole right through the middle of one of the flats right through the nut, heavily deburr the holes, and away ya go. . . . . .:thumbsup:

Quote:

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Originally Posted by redbang

" I dont have the thingee(technical reloading term) to measure to the ogive"

Easy enough to make Dino, just take a large nut (plenty of them on this forum ;)) about 5/8-3/4"(16-20mm), bore a 3/16" (4.76ish mm)hole right through the middle of one of the flats right through the nut, heavily deburr the holes, and away ya go. . . . . .:thumbsup:

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Hmm that sounds easy enough. Is there a certain size for each calibre? Ie .277

Not really, it will do most calibers.
I made a larger hole in one side when I went to 338, but as long as the tip clears the hole it works well. I've been using the one nut for 20cal thru to 338 for some years now :)

Cheers red bang

Will go and see my engineer mate this week, see what we can come up with


Puku

Had a trying day at the Bluies, westerly was swirling quiet a bit, found a ridge where wind was steady, goy onto a couple of deer, at least the dog was indicating big time, really amped. We were waiting for a short spell to see if something would walk out and a branch blew out of a tree, funny as, she nearly shat herself with the excitement, but held which is good.

Mate knocked over an eater so all good, he reckons the swirling wind helped, thinks they may have winded him, mob of 4 ran towards him and shot 1 at 5m...lucky bastard.

Posted a report re range in another thread

http://www.nzhuntingandshooting.co.n...e-please-9478/

Cheers

dino