You said in your post before that the bullet was way out of the case @ 2.450. Now you are saying that the bullet is in the case "a calibre deep". If there is that much bullet in the neck and you can find the lands the chamber is fine.
223 with 80 ELD match
- Thread starter Bottom Fodder
- Start date
He means that the ELDM is longer in the bearing surface than the SMK and when both are loaded to the same base to ogive length, the ELDM will be deeper in the case. If you do not want to encroach on your powder space, the throat needs to be longer to accomodate the longer bullet or you run the risk of the bearing surface being lower than the shoulder/neck junction and donuts starting to form which will effect seating and consistency.
Ned Ludd
Silver $$ Contributor
I also took that statement to mean that at the seating depth the OP chose to compare the two bullets, both exhibited bearing surface below the neck/shoulder junction; i.e. "in the case". How that seating depth was chosen (by COAL, having both bullets seated at "touching", etc.) is not clear, but from the way it was worded, my guess would be that the freebore of the rifle may not be sufficiently long to seat either bullet with the boattail/bearing surface junction above the neck/shoulder junction. However, that's only my interpretation.
For the OP, I don't think you're going to find an 80 gr .224" bullet with a shorter base-to-ogive or bearing surface dimension than the 80 SMK. For that reason, pretty much any other 80 gr .224" bullet will likely have more bearing surface below the neck/shoulder at a given seating depth/COAL in your setup than does the 80 SMK. I don't view that as a problem as long as the loads are adjusted accordingly. It might surprise you how much bullet shank is seated below the neck/shoulder in pretty much any commercial .223 Rem load with a bullet of 70-77 gr; it's a lot. You could certainly have the rifle throated longer to accommodate the longer heavier bullets. However, you could also just tune a good load for its current setup and accept that you may encounter pressure/velocity limitations at the high end that you might not with a [shorter] lighter bullet.
Check the bearing surface on the Nosler 85gr RDF.
To maybe clear think up some what, just touching the lands both have bearing surface outside the case. The ELD sets deeper in the case than the SMK. I think right now I will stick with SMK’s ( still got 400+) and not shoot up the ELD’s and maybe by the time I need more I can find some and I got 500 77’s which could also work. Hope this clears up what I was asking which basically a general consensus of weather ELD’s seam to prefer jam or jump
thanks hope somewhat clears up my post
thanks hope somewhat clears up my post
They like to jump and can jump far and still be very accurate.
memilanuk
Gold $$ Contributor
So... I've been following along, as I recently came across a pretty good deal on a Shilen 26" heavy Palma pre-fit (plus NSS barrel nut & wrench) that someone had gotten as part of a build that never happened. They'd sent in some dummy rounds (which I also have) to have it throated for H80ELDMs @ ~2.6" coal.
I do have a few 80ELDMs floating around in my stash, but what I have a bunch of is a couple thousand H75ELDMs. Seating them to the lands is possible... just barely... but I wouldn't want to mag-feed that load. So I've got them set back 50 thou, and that seems to be working okay so far - I've had to sort out some other things in my loading process after a bit of a hiatus
so I can't really say I've got them anywhere near dialed in yet.I'm curious how much jump you've used them with and still gotten acceptable results?
DLT
Silver $$ Contributor
What powder do you run with your 75 eld in the wylde ? Thanks
DLT
Silver $$ Contributor
Appreciate it much. Thanks
For my particular rifle, a 1:7 Savage 12 FTR 223 with a 30” barrel, they like to jump .015. My rifle jams at 1.945 CBTO with these and I run them at 1.930. 24.6gr of Tac gets them running just over 3000fps. They are super accurate.
Jeff Porter
Gold $$ Contributor
H75Amax - similar profile to 75 ELDM 0.090” off in a Wylde chambered 26” bolt rifle.So... I've been following along, as I recently came across a pretty good deal on a Shilen 26" heavy Palma pre-fit (plus NSS barrel nut & wrench) that someone had gotten as part of a build that never happened. They'd sent in some dummy rounds (which I also have) to have it throated for H80ELDMs @ ~2.6" coal.
I do have a few 80ELDMs floating around in my stash, but what I have a bunch of is a couple thousand H75ELDMs. Seating them to the lands is possible... just barely... but I wouldn't want to mag-feed that load. So I've got them set back 50 thou, and that seems to be working okay so far - I've had to sort out some other things in my loading process after a bit of a hiatus
I'm curious how much jump you've used them with and still gotten acceptable results?
memilanuk
Gold $$ Contributor
Very nice. I've been poking away at this barrel; so far the (somewhat arbitrary) 50 thou jump hasn't shown me anything too exciting. Probably going to do some seating depth tests here in a week or so when I get more time. I can only go 'in' so far and keep them in the magazine, even with it modified for longer COAL. I'll probably check 40 and 30 thou jump, and then start working back 'out' away from the lands.
Jeff Porter
Gold $$ Contributor
Here is the rest of the sequence I ran on that rifle/load. I would be curious where you end up.
On my 223AI, I had to go all the way out to 2.420 COAL to get the75 ELD to shoot but the chamber is a little long on that rifle. I would try .010 off and single load them in the chamber if you have to, just to see if that is the issue.
memilanuk
Gold $$ Contributor
In this chamber, 'all the way out' is more like 2.6" (2.593" to 'jam' with the Hornady comparator)
Which strains the capacity even of a modified AICS magazine... and this is not a gun for single-loading.
I am suggesting single loading as a test, but I think I just found your problemIn this chamber, 'all the way out' is more like 2.6" (2.593" to 'jam' with the Hornady comparator)
Which strains the capacity even of a modified AICS magazine... and this is not a gun for single-loading.
Older thread but I just started with these bullets last weekend. I’m using 25.3 grains of CFE223, CCI 450 primer and seating -.020 from the lands. COL is 2.565 in my lengthened free bore PTG match chamber. I shot 3 inch groups at 700 yards last weekend. I’m testing 25.1 grains this weekend. MV was 2903 avg.
Upgrades & Donations
This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.