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Thread: What's the Theory on the RCBS 38-175-RN?

  1. 06-02-2019, 08:25 AM #1
    Four-Sixty
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    What's the Theory on the RCBS 38-175-RN?

    I'll try these out in a Handi Rifle loaded over IMR 4227 in Starline 360DW brass. The crimp groove is so high, most of the boolit is below the case mouth. I assume it was designed this way, so my question is why? My guess would be to eliminate more space in the case to get a better case fill.

    Any other thoughts?

    The bottom round is a 360DW boolit. The top case is a 38 Special case for comparison.

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  2. 06-02-2019, 09:30 AM #2
    Mr Peabody
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    Maybe overall length was a concern
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  3. 06-02-2019, 11:58 AM #3
    Bookworm
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    It looks to have as much of the body of the boolit in the brass, as would a 38 wadcutter.

    Come to that, it looks like a DEWC, but with a gas check and a bulbous nose.

    Maybe it was designed for a higher velocity with relatively small powder charges ?
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  4. 06-02-2019, 12:19 PM #4
    INTRLOPER
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    Smith N-Frame cylinders.
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  5. 06-02-2019, 12:43 PM #5
    Outpost75
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    Quote Originally Posted by INTRLOPER View Post
    Smith N-Frame cylinders.
    Correct, short cylinder S&W N-frame .357s Models 27 and 28.
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  6. 06-02-2019, 12:49 PM #6
    swheeler
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    correct amundo
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  7. 06-02-2019, 01:29 PM #7
    Four-Sixty
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    Are current N frame Smith's still using the shorter cylinders?
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  8. 06-02-2019, 01:35 PM #8
    Outpost75
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    Quote Originally Posted by Four-Sixty View Post
    Are current N frame Smith's still using the shorter cylinders?
    N frame yes. K and L frame no.
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  9. 06-02-2019, 01:38 PM #9
    trapper9260
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    That is interesting to know.Learn something all the time on here.That is what I like about here.Always learn something new.
    Life Member of NRA,NTA,DAV ,ITA. Also member of FTA,CBA
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  10. 06-02-2019, 03:21 PM #10
    Taterhead
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    I have nothing to add to the original question. Only popped in to say that those are some beautiful looking cast boolits!
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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check