Some one has to explain this to me

.223 with the hornady 68gr hpbt, it's a fairly long bullet and the ogive is kind of forward which makes it sit pretty deep. I started with fairly mild charges but even those where just starting to compress.
 
I have very little experience with the .223 but with what little I have, I know that it's hard to stuff a longer bullet over a lot of Varget into them. Though I read a fair bit about guys using it successfully. Maybe that's an accuracy over velocity thing. There are several spherical powders and smaller-cut stick powders that work well in this cartridge - maybe you should consider some of those if you're after velocity.

Any update concerning seating without powder?

Rooster
 
A compressed powder charge will definitely push a seated bullet back out of the case. I've confirmed it several times. Neck tension and how much compression plays a roll obviously. Will it push a bullet by .015 to .025"? Good question.
 
Tak, your differences are definately related to compressed powder charges. I use a lot of compressed charges in different calibers and I reset my seating depth every grain I go up while making test loads. I used to use a load in my 340 Wby that would push the bullets back out over .060" if I didn't crimp them in the cannelure. You need to reset your seater to attain the correct depth WITH THAT CHARGE. It is important if you are working near max loads and close to your lands as they can ooze out and jam into your leade and increase pressures significantly. The whole powder, bullet and case combination has spring to it when seating on a compressed charge and you have to accomodate this spring by setting your seater appropriately to that load and then carry on.
 
Negative but i was away for 10 daysish hahaha will post the results asap maybe this weekend! Thanks fbmi ill try to compare it in my situation to show anyone by how much it changed for me cheers!
 
What type of bullets were you loading, I had a problem with mine, that my seating die was not adjusted correctly the first few, that the polymer tip of the A-max got caught in corner and were making some weird seating issues.

Took it out adjusted it, and now seats perfectly.
 
68gr hpbt hornady the only issue i had with the die yet is the seaterseems to be eating alittle bit of the bullet every time ie there were copper residues aroundthe seater wheni took it appart
 
All right after doing some testing I think the difference comes from the compressed powder load that causes the bullet to spring back.

Here is how I came to this conclusion :

I don't have a bullet comparator so :

-With my OAL tool i found 2 bullets that gave me the same Max OAL in my gun : 2.287
-Measure the total lenght of those two bullets, they where within .0005
-Took 2 cases of the same batch resized the same and trimmed to the same lenght
-Loaded a dummy round to my target OAL of 2.275 (hit 2.274)
-Loaded a round with the powder (24.9 gr varget = compressed load) without changing the seating die adjustment
-New round was 2.286 (spring back .012)

For the sake of saving on components I didn't repeat the process but i'm confident in the consistency of my measurements.
Also, I think what might have added to that was that my first dummy round had a bit less neck tension so I could remove the bullet, some additional springback must be coming from the neck tension.

I think that solves the mystery though :p

Cheers!
 
Jarlath said:
If you had stated you were using compressed powder loads we coulda ended this thread dozens of posts ago :)
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x2, compressed loads can and will push the bullet back out of the brass, the extent depends on the powder type and how much is being compressed, like a 104% load or a 115% load.
 
Jarlath said:
If you had stated you were using compressed powder loads we coulda ended this thread dozens of posts ago :)
Click to expand...



Ahem......... Post #19.

Tak said:
Well that's pretty much what I do to prep my cases, just short of brushing the inside of the neck, I'll try that though see what happens. But otherwise they are all trimmed to the same lenght (fired ones) the virgin one is maybe .005 shorter

To put things out in perspective, the way I found out was I set my seating die with the dummy round (virgin brass) and then loaded a couple real ones, measured them and saw the difference. I thought it was odd, chambered them, they chambered fine, remeasured them (No change, no marks from the rifling) so I thought it was fine, then just out of curiosity, every 5-6 rounds or so, I would take a new bullet, seat it in the dummy round, measure the oal, remove it, seat it in the reloaded round and measure it. Every time it would come out between .015 and .025 longer in the reloaded round. However, now that you talk about compressed charges, all my charges were compressed. Could it be the powder pushing the bullet out ?
Click to expand...
 
Haha thanks rooster :p

Any ways I guess that's what causing it, might have seemed obvious for someone with more reloading experience, but clearly I had not realized the strenght of the spring moment of compressed powder :p

Thanks to everyone !

Btw those loads work pretty good with .40 @ 100yds ;) ( 24.8gr varget 68gr bthp) and I figured with the spring back they are about .005 off the lands.

Cheers
 
Good for you bud! Sounds like a smoker! Now do it again!:evil:

This is exactly how I learned (and am still learning) - make mistakes, eliminate variables (one at a time), experiment (safely), ask questions (consider everything but retain proven logic only), and resolve! See? This is how this is supposed to work! Now you know and you can pass it on to the next guy.

Rooster
 
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