ideal 311281 plain base "stop ring"

[harrympope]

i have yet to shoot it ,I've only cast a few to try out. I bought the mold recently and had not realized that it had a stop ring. I could find no documentation from Lyman that the mold was stop ring design. It is not modified I can tell you that.
I've owned two other .30 ideal designs with the stop ring as well as had Eric Ohlrn modify a couple of others to stop r guning when I experimented with them a few years ago.
Shooting them in 30 caliber military rifles I never found that they were any more accurate than standard bullets. Often times they were less accurate.

The mold dimensions are quite odd .the nose is .298, the stop ring .320 in the main driving bands .310.

I'm not sure what gun I'm going load it for but it's worth a try I guess?

 

[Kevin Stenberg]

What is the stop ring?

 

[Spindrift]

The front driving band, probably?
Interesting design, never heard of it.
The undersize nose might prove less of a handicap if you had the means to taper bump the stop ring to your throat angle, maybe. Anyway, good luck with your bullet and please keep us posted on your results!

 

[358156 hp]

An unusual mould to be sure. It looks like production was pretty scarce for that design as well.

 

[harrympope]

I have Eagan taper dies for my lubesizer as well as swage dies matched for my 30 BR throat.but the stop ring diameter woundnt let it in the dies to properly bump up the nose.ive had ok luck with small noses if the body is long enough and velocity low enough.
im.gonna try it as cast in my old model 70 30-06 and see what happens.

Anyway to stop ring was means to stop the bullet going back into the case and also a larger diameter to fill the throat. I believe it is of German origin .the 8.15x46 often used this design. Cases were just de and re primed and powder dropped in from pre measured vials sold in stores.

 

[Ben]

I have an Accurate .30 cal , 180 gr. 3 cavity mould made by Tom.
One cavity cast a plain base, the other two are g/c.
It is a " stop ring " design.
The dia. of the stop ring is .3035"
A super accurate bullet.

Ben

 

[harrympope]

It looks like the nose has "DD" band on it.
a stop ring bullet has driving band before the nose at the diameter the outside of the case it's essentially a "heeled" bullet.

The band you have in the nose was invented by a friend of mine Stan Borgeson at Nei and conjunction with Walt Melander.
Both of them are since passed and it meant dog xxxx. But they called it "dimensionally detailed" so wouldn't be so defensive. Stan came up with the idea because he was a former Marine and they used to use a front band like that on some larger artillery. Somewhere I have one of the originals it was called the 188 DD. They shoot very well

 

[RicinYakima]

Geo., I looked at the diagram in the 1957 Lyman cast bullet manual. It does appear to have the drive band formed at an angle. I seem to remember that one of the early 1900's, besides Pope, writers said they designed a bullet that would work like a stop ring is loaded but work in the new 30-1903 case. Will try to find the reference tonight. Ric

 

[Ben]

Sorry........I think I got my words , terms confused.

Ben

 

[harrympope]

Please look Rik cuz the manuals I had did not show it as being a stop ring. And I have that 1957 manual as well and it does look like the band is definitely larger but it doesn't State anything about the ring.