Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Wytex, ocardwell, Highcountryrider, MechWario, PMURT2017
60466 Registered Users
Top Posters
dogcatcher 77435
stxranchman 52092
RWH24 44568
rifleman 43786
BOBO the Clown 41109
BMD 40539
Big Orn 37484
txshntr 33685
bill oxner 32651
sig226fan (Rguns.com) 30571
facebook
Forum Stats
60466 Members
45 Forums
476036 Topics
6244644 Posts

Max Online: 16728 @ 03/25/12 08:51 AM
Page 1 of 2 1 2 >
Topic Options
#6520268 - 10/31/16 04:11 PM bullet seating variations
Big Stan Offline
Bird Dog

Registered: 05/02/14
Posts: 272
My .308 Lapua cases are fired 2x, and neck sized with Redding Competition Die, and trimming is not really needed because its around 2.005 case length, some are from 2.003 to 2.006, so no big deal. Now when I seat the 168 SMK, I measured the ogive on each bullet, and there is a variation up to .008" on base to ogive. Why is that? My RCBS press is about 25 years old, don't you think it might be some wear? It's frustrating when you spend a couple of hours prepping cases, fill and seat bullets and find out at the end that there is a seating variation.


Edited by Big Stan (10/31/16 07:16 PM)

Top
#6520298 - 10/31/16 04:26 PM Re: bullet seating variations [Re: Big Stan]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6220
Loc: Wise Co.
I have had brass that would cause that. Usually I would know it by the feel of seating the bullet...good necks accept the bullet with nice, even pressure all the way to the end of the stroke, but bad necks developed a spongy resistance toward the end of the seating stroke. Measuring would always verify inconsistent seating when this happened. Annealing has never seemed to help, so I toss the brass and buy new. Now I always look for Nosler cases and sometimes Lapua or Norma.

There might be other causes of inconsistent seating depth but if you can feel that same kind of sponginess during seating and verify a seating depth variation when it happens, then it's bad brass.

Are you noticing an odd feel of the press handle when you get a bad OAL?
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

Top
#6520308 - 10/31/16 04:31 PM Re: bullet seating variations [Re: Big Stan]
mikei Online   content
Pro Tracker

Registered: 11/16/14
Posts: 1279
Have you lost accuracy with these reloads? Or is this a "reloading bench" anomaly you've noticed? Your measurements from base of bullet to ogive is interesting. First thing I would do is check the lot of bullets you're using and make sure they're all the same dimension. I don't think your seating die is worn out, but it's well worth your time to give it a thorough cleaning with solvent and Q-tips to make sure no debris has lodged in there over the last quarter century. I'd also suggest, just for the heck of it, after cleaning the die and checking the bullets for consistency, that you get some new, unfired brass and, using it, follow your usual reloading routine on a few cases to see if the variation still exists. Over the 5+ decades I've been reloading, I've decided that there are some strange things that go on in the ballistics world that don't always have a good, solid scientific cause; at least not one that we mortals can figure out at the bench or the range!


Edited by mikei (10/31/16 04:35 PM)

Top
#6520366 - 10/31/16 05:03 PM Re: bullet seating variations [Re: Big Stan]
Big Stan Offline
Bird Dog

Registered: 05/02/14
Posts: 272
RR, no I don't have any odd feeling seating the bullets, they all almost seats the same. You think the press may be worn?

mikei, no I have not lost accuracy, last time I shot it, it shot .2 MOA at 100 yards and just following up with the same loads I found and just varying OAL lengths in .015 thousands from 2.820 to 2.860 COAL and to fit the magazine.. I am shooting the .308 Crusader, only 60 rounds down the tube. I took the seater apart to check the seater cup and stem, looks just fine and bullets seats right in on the ogive, not on the tip. I'll clean out the die later with carb cleaner and pressurized air and lube them a little and re try soon.

Top
#6520382 - 10/31/16 05:13 PM Re: bullet seating variations [Re: Big Stan]
pertnear Online   content
Bird Dog

Registered: 12/31/14
Posts: 268
Loc: Kingsland, TX
I have noticed variations in the "base to ogive length" in my reloads also. But do the same "base to ogive length" check on the bullets alone. You may be surprised at the variation, especially on hunting bullets.
_________________________
You can tell a lot about a woman's mood just by her hands. If they are holding a gun, she's probably very unhappy.

My Texas blog: http://thedrchronicles.com/

Top
#6520425 - 10/31/16 05:39 PM Re: bullet seating variations [Re: Big Stan]
mikei Online   content
Pro Tracker

Registered: 11/16/14
Posts: 1279
Originally Posted By: Big Stan
RR, no I don't have any odd feeling seating the bullets, they all almost seats the same. You think the press may be worn?

mikei, no I have not lost accuracy, last time I shot it, it shot .2 MOA at 100 yards and just following up with the same loads I found and just varying OAL lengths in .015 thousands from 2.820 to 2.860 COAL and to fit the magazine.. I am shooting the .308 Crusader, only 60 rounds down the tube. I took the seater apart to check the seater cup and stem, looks just fine and bullets seats right in on the ogive, not on the tip. I'll clean out the die later with carb cleaner and pressurized air and lube them a little and re try soon.


Big Stan, if you're not noticing a loss of accuracy, I would suggest that you make lots of notes of the strange things you have found, enter them into your reloading log, and then head to the range or the blind and enjoy yourself! It's one of those, "If it ain't broke, don't fix it" kinda things. In my world, .2 MOA doesn't look or sound like something is broken.


Edited by mikei (10/31/16 05:40 PM)

Top
#6520445 - 10/31/16 05:55 PM Re: bullet seating variations [Re: Big Stan]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6220
Loc: Wise Co.
I'll second that. I'll take .2 MOA anytime I can get it...and it don't come easy.
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

Top
#6520561 - 10/31/16 06:56 PM Re: bullet seating variations [Re: mikei]
Big Stan Offline
Bird Dog

Registered: 05/02/14
Posts: 272
Originally Posted By: mikei
Originally Posted By: Big Stan
RR, no I don't have any odd feeling seating the bullets, they all almost seats the same. You think the press may be worn?

mikei, no I have not lost accuracy, last time I shot it, it shot .2 MOA at 100 yards and just following up with the same loads I found and just varying OAL lengths in .015 thousands from 2.820 to 2.860 COAL and to fit the magazine.. I am shooting the .308 Crusader, only 60 rounds down the tube. I took the seater apart to check the seater cup and stem, looks just fine and bullets seats right in on the ogive, not on the tip. I'll clean out the die later with carb cleaner and pressurized air and lube them a little and re try soon.


Big Stan, if you're not noticing a loss of accuracy, I would suggest that you make lots of notes of the strange things you have found, enter them into your reloading log, and then head to the range or the blind and enjoy yourself! It's one of those, "If it ain't broke, don't fix it" kinda things. In my world, .2 MOA doesn't look or sound like something is broken.


Did not say it was broken, .2 MOA is a nice group but it is a variation that I wanted to figure out.

Top
#6520619 - 10/31/16 07:26 PM Re: bullet seating variations [Re: Big Stan]
mikei Online   content
Pro Tracker

Registered: 11/16/14
Posts: 1279
Well, by all means, keep working the question and if you find the answer, please share it with us. For me it falls into the category of one of life's (and reloading's) many mysteries; I'd love to have the answer to this one!

Top
#6520803 - 10/31/16 08:51 PM Re: bullet seating variations [Re: Big Stan]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Is this a turret press?

Have you compared only the bullets from base to ogive?
_________________________


800 Yard Steel Rifle Range
Long Range Shooting Instruction
Memberships and Classes Available


Top
#6520902 - 10/31/16 09:42 PM Re: bullet seating variations [Re: FiremanJG]
Big Stan Offline
Bird Dog

Registered: 05/02/14
Posts: 272
Originally Posted By: FiremanJG
Is this a turret press?

Have you compared only the bullets from base to ogive?


It's a Rock Chucker RCBS.

I did measure the bullets on the Hornady comparator, out of 55 bullets, most of them measured .597 and some was under / over a thou or two. To my surprise, 5 bullets measured .623 to .626 which is way off. But what does it have to do with variations that I am having, if I may ask. Fill me in, just a bit confused,,, if the bullet base to ogive measurements is in variance, how does it affect base to ogive measurement of a loaded round? You are still going to push the bullet with the longer ogive deeper and should be the same measurement as a bullet with a shorter ogive on a loaded round, correct?

Top
#6521612 - 11/01/16 11:31 AM Re: bullet seating variations [Re: Big Stan]
redchevy Online   content
THF Celebrity

Registered: 10/25/04
Posts: 23443
Loc: Texas
Out of curiosity is it a compressed load?
_________________________
It's hell eatin em live

Top
#6522047 - 11/01/16 03:47 PM Re: bullet seating variations [Re: redchevy]
Big Stan Offline
Bird Dog

Registered: 05/02/14
Posts: 272
Originally Posted By: redchevy
Out of curiosity is it a compressed load?


No, I did not feel any powder crush, powder level was at the bottom of the neck.

Top
#6522077 - 11/01/16 04:15 PM Re: bullet seating variations [Re: Big Stan]
Creedmoor Online   content
Tracker

Registered: 09/12/16
Posts: 687
Loc: Soon to be Hudson Oaks


The base to ogive variations on the bullets won't have any effect on your complaint.

There is only one thing that could cause this ....... there is slop in the system somewhere. Either the seating die is hitting the bullet tip, the die itself is not tight in the press, the shell holder is moving around, or the press ram is worn and not consistent. If everything is locked into position this couldn't be happening. Check your equipment carefully and you should find the problem.
_________________________
.
There's a fine line between BRAVE ... and STUPID.


Top
#6522201 - 11/01/16 05:24 PM Re: bullet seating variations [Re: Big Stan]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6220
Loc: Wise Co.
One other possibility---the bullets are not formed consistently. Maybe there are variations in the ogive shapes. I suppose this could conceivably show up in the measurement of the bullet itself, from base to ogive.
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

Top
Page 1 of 2 1 2 >



© 2004-2016 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide