TCFP vs RNFP lead bullets?

[Rule3]

In lead bullets what is the advantage or disadvantage, if any between the two shapes (TCFP or RNFP). I see the different profile but does one feed better in certain actions or what?

In a revolver I can not see where there would be much difference either way. Why are some 40 SW FP and most 9mm are not?

 

[rcmodel]

In general a TC bullet of the same weight will be slightly shorter then a comprable weight RN.

As designed, the .40 S&W first came out using a 180 JTC bullet.
The 9mm first came out with a 115 or 124 grain JRN.

I always thought it was done in order to get the 180 grain bullet to fit in a 9mm size magazine, as well as preserve all the case capacity possible in the short .40 S&W case.
But I'm just guessing.

rc

 

[Rule3]

How about in the 38 special bullet, some are RNFP and some are TCFP?
Does one fly better than the other, more accurate or is it just for feeding in tubular magazines?
I bought some RN for my Marlin Carbine but also want a good slow bullet for 38 revolver target. The Carbine will not feed LSWC

 

[Sunray]

TC's feed extremely well in my Inglis BHP. Don't use for anything else.

 

[Maj Dad]

I recently bought a Lee 158 gr RNFP mold because I wanted a good non-gas check 158 gr bullet for 38/357s. I think the intent was for it to be a Cowboy Action bullet for pistols & lever actions with its wide meplat, which I presume makes it a harder hitter with the cowboy targets - whatever, it is a good shooter and I like it.