Bullets seats easily than others

[gemini1]

So I was loading 55 FMJs for my next load test. On some of the casings, I could feel the bullets gets seated in a little too too easy/smoothly than the others, kinda like it hardly needs any pressure as I pull the lever down.

Brass are all the same (LC08), should I crimp it?

[ExtremeX]

What are you loading for, and what type of dies are you using? Neck size, bushings, FL with expander ball??

Crimping isn’t a solution for issues with neck tension… have you measured neck tension to see if they are consistent?

If they are, it could be the chamfer / deburring… I found that also changes how a bullet feels when being seated.

[gemini1]

Its a Lee FL sizing die. Bullets are 55 fmj from Extreme. I'm just trying to find the sweet spot for this bullet weight with Benchmark.
Never had this issue on my previous batch of 62 gr Everglades and some 55 gr fmj Hornady.

edit: I think I found the issue. I just measured some of the bullets and found some that measures .223-223/5"
So I guess I better crimp the batch I just loaded to be safe? My only concern is, if on these loads I find a sweet spot, then I would have to crimp the succeeding batch as well?

[CK_32]

I had the same thing when I was loading my Remington 55grers.


I read up on it and its caused because the case didn't fully go through the FL die (assuming your shooting from a autogun)

All I was was add a slightly bigger crimp and they sat fine. I also read that if you didn't run them through the FL die again you would have major feeding issues.

Put them through yesterday and didn't have a single issue with any of the rounds that didn't seat and I just crimped. No issues or problems feeding. I'm sure some here will disagree and I'm not saying its the way to go but sometimes what the book says or the interwebs isn't what actually happens.


YMMV.

[ExtremeX]

Assuming his calipers are reading true… .223 .2235 would indicate the bullets are slightly undersized.

All my projectiles measure out .224

[Bumslie]

Is your die set the pace setter one? I've run into multiple sets where the expander ball was too large. I sanded the expander ball down before buying another set.

[jj805]

Is your die set the pace setter one? I've run into multiple sets where the expander ball was too large. I sanded the expander ball down before buying another set.

This^ Measure the expander ball. If it is too big, sand it down a thousandth or two.

[gemini1]

I dont think its the die expander ball. As I've mentioned earlier, my previous loads (Everglades 62 gr & Hornady 55s) didn't have any issues.

I measured the rest of my projos for next loading session, I did find several more that were undersized (.223/5).

[Bumslie]

I dont think its the die expander ball. As I've mentioned earlier, my previous loads (Everglades 62 gr & Hornady 55s) didn't have any issues.

I measured the rest of my projos for next loading session, I did find several more that were undersized (.223/5).

Hmm intersting. I'll have to spot check if I buy any of the Xtreme projectiles.

[bohoki]

are they the same headstamp ?
no hairline neck splits

[Whiterabbit]

sort by pressure to seat. when you go shooting, see if there is a POI shift. You might find nothing. Or, you might find the neck tension affects velocity uniformity and poi.

[gemini1]

are they the same headstamp ?
no hairline neck splits

Yes, all LC 08, FL sized and trimmed to 1750" chamfered/deburred and checked for any signs of fatigue.

sort by pressure to seat. when you go shooting, see if there is a POI shift. You might find nothing. Or, you might find the neck tension affects velocity uniformity and poi.

Not sure if I can still see any difference since I've crimped all of it.

[sofbak]

Here's another reloader who was having similar problems with undersized xtreme projectiles (see post #8):

http://www.calguns.net/calgunforum/showthread.php?t=812470&highlight=xtreme

[BLR81]

Yes, all LC 08, FL sized and trimmed to 1750" chamfered/deburred and checked for any signs of fatigue.



Not sure if I can still see any difference since I've crimped all of it.

You haven't mentioned the mouth diameter after sizing. It should be around .0015-.002" smaller than after the bullet is seated. If the resized case mouths are too wide, you may be having spring-back issues because the cases have hardened from previous resizing.