7x47 XP-100

[historicfirearms]

I'm starting to reload for an XP-100 chambered in 7x47. The previous owner gave me a set of 7tcu dies that he used to neck size 222 rem mag brass. I think this is the same cartridge as 7x47 Helm and Hornady makes dies for that one if I need a full length sizer. What I'm after is load data. 7TCU data should get me close as the cartridge is nearly identical except for shoulder shape and location. Anyone ever reloaded the 7x47 and have any good loads they want to share? I'm thinking of getting a 7mm mold too and like the looks of the rcbs 7mm silhouette.

[Shuz]

Another good design is the Saeco 070 in 145g and 071 in 160g. My wife and I shot them in IHMSA competition for years in both TC's, in 7mmTCU, and our XP-100's that were also chambered in 7mmCU.

[stubshaft]

I personally favored the RCBS 145 for all of my sillywett shooting. I have used it in the 7mm Intl Rimmed, 7BR, 7 TCU, 7 IHMSA and a couple of other 7mm wildcats. Lubed with LBT blue it always brought home the bacon to the tune of 20+ State Championships.

[buckstix]

Hello all,

Well, it looks like I'm about 5 years late to this post. I just found it by accident.

I'm the man that invented the 7x47 cartridge in 1978 for IHMSA competition while I was the Wisconsin State Director of the IHMSA. I necked-up the 6x47 benchrest cartridge (also 222 rem mag necked-up) and called it the "Helm 747 Thunder Jet". (2 years later Wes Ugalde copied my cartridge using the more readily available 223 case - and convinced T/C to chamber it, hence called the 7mm TCU)

My custom XP-100 pistols and cartridge, with load data, were published in the 1979 American Handgunner Magazine, pg 36.

(see this .pdf for the complete magazine) https://americanhandgunner.com/1979issues/HJF79.pdf

here is a copy of my article
329962

329963

Dies for my cartridge are still available from Pacific. (or PM me) By the way, I still have the very first custom 747 cal. XP-100 that I built for IHMSA competition. I won the 1st place in the 1978 IHMSA Regionals with it, and also placed in the Nationals that year.

[Hamish]

Helmut,

Your post brings back fond memories of shooting IHMSA. 7TCU was my first cartridge, and I liked it very much, but it was always a little underpowered on the rams, even with 175gr jacketed. I can definitely see where the 7X47 would have had more oomph.

There really is nothing like a center grip XP-100, and yours is a most elegant example, thanks for sharing it with us.

[buckstix]

Helmut,

Your post brings back fond memories of shooting IHMSA. 7TCU was my first cartridge, and I liked it very much, but it was always a little under-powered on the rams, even with 175gr jacketed. I can definitely see where the 7X47 would have had more oomph.
There really is nothing like a center grip XP-100, and yours is a most elegant example, thanks for sharing it with us.I used 175g Nosler partition bullets at 2000 fps for the rams ... It never failed ... never had a "ding".

[marshall623]

When I shot IHMSA , a guy had a 7X47 XP . His had the factory stock and had a set of Bomars on it . That thing was deadly accurate.

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