Neck not hollding the 300rum bullets

[Petes smoking 300rumxcr]

Hellow, I would like to know if anyone has had a problem with the neck of the rum300 holding the bullet. I don't know the total times the shells have been loaded but its around 3-5 times. The bullets went in easy so I tried to mic them and I could push them in with the mic. So I would grab the bullet and it would turn. I pulled bullet and dumped powder out, then resized the case, just neck sizeing that is all I have done after fire forming them anyway, and the bullet was still free. What is going on, should I through them away, I see know apparent defects on the case.

 

[FOTIS]

I never ever had that problem!

What dies are you using? Are you full length resizing?

have you reamed the inside of the necks- or maybe someone else? Too much reaming will remove enough brass to the point of not being able to seat the bullets.

Give us some more info.

 

[JD338]

Also check to see if the necks are cracked.

JD338

 

[Petes smoking 300rumxcr]

I am new to reloading, but only ten of the 30shells in the last set I did are doing this. I am using RCBS 2 die set and Iam just neck sizing, do you think full sizeing would fix the loose neck. I have never reamed the necks at all just chamferd them. I have also visually looked and can find no cracks. I even resized them again and still I can put the bullet in by hand with no pressure hardly.

 

[Petes smoking 300rumxcr]

I said I was useing rcbs dies, that was wrong, I have redding 2-die set.

 

[Desert Fox]

Pete, just curious. Your new to reloading so I'll ask this question. You are using a full sizing die to neck size the brass. Tell me how you do it. Are you sure you are doing it right? Why don't you full size the questionable brass and see if it is still loose. If it does, then send your die back to Redding and tell them to send you another one.

 

[rick smith]

Pete, this subject has been discussed before and opinions vary but if you want to neck size, get a neck sizing die. You cannot neck size with a FL die without contacting part of the body of the case. If you want to use the FL die you need to do a search for PFL, partial Full Length, then set you die. Don't forget to lube the cases if you go this route. Sounds to me that you have set the die enough off the shell holder to avoid FL and may not be sizing the neck.Rick.

 

[chet]

Pete, I think all the methane from your cattle has settled in the bottom of middle canyon and could be changing the metalurgy of your brass.
For what you're wanting to do with that rifle, you really should at least be partially full length sizing.
example:
fired brass in august: 98 degrees
neck sized brass in september: 80 degrees
jack one in on an elk hunt in december: 30 degress, bolt dont close
temperature and humidity change the relationship of the round and chamber. I dont like to take chances with "hunting" loads, especially on a trophy hunt. "target" loads are a different story.
my rule of thumb: if it's a hunting load, full length size it.

are all Greeks as good looking as you?

 

[Guy Miner]

Yup, you're just not getting the necks sized down enough.

I have the same thing happen sometimes when I switch to thinner brass and use my neck sizing dies. This is NOT the way you want your hunting ammo. Hunting ammo, above all else, needs to be 100% reliable. Full length resizing is appropriate. Heck, I even full-length resize much of my match ammo, particularly the stuff I use in rapid fire events... It works just fine, accurate and reliable.

Go ahead and full length resize those cases - they'll work great! Remember to trim them too - it's normal for the brass to "grow" with firing and sizing. Also, it's pretty normal to get fairly short brass life when using full-power hunting loads in intense magnum cartridges, especially in a relatively loose factory chamber. I've had magnum brass go belly up after 5 firings. Trying to stretch brass life too far is false economy.

Neck sizing is neat stuff - and I do it for three of my rifles (two match rifles and a varmint/predator rifle) but the rest, including my .300 RUM, get the full length sizing dies.

Regards, Guy

 

[Petes smoking 300rumxcr]

Well I tried to full size the bad brass and they still wont hold a bullet so then I full sized my new brass and they were fine. I will go and shoot some shots and reload some more and see what happens. When I full sized the brass on the bad ones they mic. at.306 the bullets were.306 to .3065. The new brass after rezing was .305. I took my die apart and could't see any problems, the inside were the neck is sized looked like their might be a bit of were but I could have been looking at machining, I will have to comepare it to new ones.

 

[Desert Fox]

.306 Sounds like you have an undersized bullet. You should have .308 :?: What brand of bullet are you using?

 

[Petes smoking 300rumxcr]

I have accubonds 180 grain and some silvertips they hit the same. But I mic. some 200 grain accubonds and they hit .307 so my caliper might be of .001 I need to check it against some standerd bars.

 

[chet]

Pete, bring me some samples when ya get time, I got a mic here at the shop and I want to measure your wall thickness too, you may have a tension problem.

 

[FOTIS]

are all Greeks as good looking as you?

I do not get it? :?

 

[chet]

Pop, Pete and I are Greek, hadsome Greeks at that!
So we poke each others ribs ocassionally....... okay, alot!

 

[FOTIS]

Add me and JD338 to that Greek group!
My real name......Fotis Papadopoulos :wink:

 

[Petes smoking 300rumxcr]

Pop I am a rancher and a Greek chet is just giveing me crap becouse we are friends and talk to eachother most days. I wrought about my shells not fitting in my magazien once and you said you load to fit your magazine I was wondering what lenght your shells end up at.

 

[FOTIS]

Well my fellow Greek.....

For my 300 RUM I think it is 3.660 or so. This is for a SAKO 75 300 rum.

Where are you at BTW?

 

[chet]

Okay Pete, I got your brass right here in front of me.
Here is what I want you to do.
First off, looking at the shoulders of the new brass, it needs to be full length sized, no doubt.
now, I want you to take the die apart, removing the expander ball. Mic the inside of a bad one (I'm getting .307) then run it up the die without the expander ball. this will size the outside of the neck without sizing the inside. Mic the inside again and see what you've got (should be about .304 with the expander and could be as little as .295 without the expander) If you end up with less than .305 then I say the die is good. Then the next step would be to call Redding and find out what the o.d. of the expander ball should be as this is now the suspect problem. The expander ball sizes the inside of the neck after the outside has been sized. So it may bee .001 too big, so after the brass has been worked a bit it enlarges the neck.
I do not think the bullets are suspect because I know how accurate they have been shooting out of your rifle, also velocity is consistent.
also i wonder if the expander ball could be upside down???? not sure what that could effect.
If everything checks out, I want you to liberally lube (wet) the inside of the neck, then full length size and check the specs.
and if that doesnt work...... chuck this R-P shit and buy a new lot of W-W, I've had better luck with win brass, however the rum may still be propietary.