[johnAK]

I have Rockchucker , so far used it for .45 ACP, now I tried to use it with 6.5x55 lee die for rifle, shell holder came with lee die set goes into Rockchucker shellholder slot very hard , seems very very tight, i had to use rubber mallet pounding to put it in, and get it out, .45 die and shell holder I used RCBS set, and no problem with RCBS shell holder using only finger to put it in and out.
so Is lee shell holder and RCBS Rockchucker are not a good match? How's your Rockchucker press with lee shell holder?

[Mal H]

I've had no problems with Lee shell holders in my Rockchucker press. In fact, Lee is about all I use for shell holders since I bought a set of 10 different holders in a case. You might have gotten a poorly machined one. Check the various diameters with a caliper and see how it differs from the RCBS.

[kentucky bucky]

I've had the same problem with my RCBS press. Anything but RCBS shell holders are too tight or won't go in at all. I thought it was just my press, but looks like I have company. Somebody suggested that I mill or sand down my shell holders just enough to make them fit. I think it would be better to just buy RCBS shell holders.

[Nero Steptoe]

I've loaded several thousand rounds of .45ACP; .44 Mag; and various rifle calibers on my Rockchucker, using Lee shellholders. Have you tried putting a little lube on the part of the shellholder that slips into the Rockchucker's slot? Do you "twist" the shellholder into the slot?? (I do.) I have found a few Lee shellholders to be a little tight, but once they're in, there's no problem.

[Black Snowman]

For the price of 2 RCBS holders you can get an entire set of Lee holders and have money left over for sandpaper. I'm a cheap bastard and I recommend tweaking the Lees to fit rather than modifying your very nice press or spending extra money on the RCBS holders.

My friend Kamicosmos has a RCBS Special 5 and the Lee holders don't seem any tighter on it than my Lee Challenger press (which is to say, pretty damn tight).