Propellers????

[NSP64]

I have a RCBS .243 DC 100gr mold and the vent lines cross right at the nose tip and when I cast with it the boolits come out with propellers? What's up?

[Blammer]

make sure the mould is closed and no trash is holding it open.

[NSP64]

It's not on the ojive it is on the very tip ond when I open it slow you can see the lead in the vent line?

[Wayne Smith]

If it's not a new mold I'd bet someone etched them larger than necessary.

[Alchemist]

If you can't get it to cast for you, send it to RCBS and they'll make it right for ya. They replaced a mould for me years ago when I tried to teach a friend to cast...he beat hell out of the sprueplate, I sent it to RCBS with the intention of paying for repairs-but they replaced it free of charge. Can't beat RCBS's customer service...well Dillon is pretty close. :mrgreen:

[Rick N Bama]

I had a new 9MM-147 that cast the same way. I sent it back to RCBS & a new one was quickly delivered. The new mold casts just fine.

Rick

[44man]

Man, I hate it when someone beats me to an idea! :bigsmyl2:
A self propelled boolit yet! :veryconfu
I would not worry much about it if the little nub will scape off with a fingernail.
I made one mold with the vents too large and I call them "cactus" boolits. They put the "sticks" to deer. [smilie=s:

[flinchnjerk]

Just be sure that the propeller's pitch is the same direction as your barrel's rifling twist, or the boolits might fly back into your barrel.

[Buckshot]

..............Could be a number of things. Has it always done this, or is this it's first outting?

Possibilities:

1) Vent IS too large but if the same size as the rest of them it's just in a poor spot. Conatact RCBS and get a new one.

2) Alloy is too hot. Blocks too hot.
3) Alloy is too 'liquid'. Usually means a high tin content. Can flow like a sunuvagun.
4) Alloy pressure too great when pouring.
Bottom pour: Hold mould away from spout, hold mould at a slight angle to the spout initially then turn upright, have alloy stream hit edge of spruehole countersink .
Dipper: Hold dipper slightly off spruehole countersink when beginning the pour, Have alloy stream hit edge of spruehole countersink.

.................Buckshot

[44man]

Flinchnjerk, I can't respond! I spit out my coffee again. :drinks:

[44mag1]

I have an rcbs 45 saa 270 mould that does this. I always get one that has it and the other dosent. If the lead is too hot I get it with both.