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550B F funnel

I have two F funnels, one is 1/2 longer. Any reason?

Same here.

One is from a 20+ year old 9mm die set and the other is from a .380 purchased last year.

Prior to the introduction of the RL550 in 1985, the handgun powder funnels were shorter. The automatic powder measure required a longer funnel to ensure full travel of the powder bar, so funnels were lengthened. Some, such as the E and F funnels, required a step in the body diameter to accommodate the extra length.

So, will they both work with my machines, I have two 550's and a 650. One 550 is from the early 90,s not sure of the date on the other one. 650 is also from early 90,s.

If the shorter funnel does not have a second step above the expander portion of the funnel, then it will not work for an automatic powder measure. If it does, it will.

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