7 RUM Testing

Have you given any thought into trying some Berger 180 gr bullets? They work excellent in my stw. I too use H1000 and behind 74.5 grains I am getting 3100 fps and simalar groups, I've managed 2.7 in groups at 500 yards so maybe theyll give you better performance being you have a heck of a lot more case capacity.
I also switched from fed match primers to wlr as the feds were giving me to much extreme spread.
Let me know how ya do if you try the bergers because I have been contemplating rechambering my stw to a rum. One note though I have a 34 in barrel so my figures will reflect fps differences.
Dave

[bblaine2k]

Well, it has been quite some time since I was here last. But I've managed to do some loading and shooting of my 7 RUM.

It's in the standard Sendero Stainless Fluted package and topped with Sightron SII series 6-24X mil-dot scope in Leupold Mounts.



As for my most accurate load that I've found for it, this is what works for me.

Load Name: 7RUMAccuracyLoad
Bullet Mfg: Sierra
Bullet Type: HPBT MK
Bullet Caliber: .284
Bullet Weight: 168
Ballistic Coeff: 0.636
Powder Mfg: Hodgdons
Powder Type: H-1000
Powder Weight: 88.200
Powder Lot Number: ?
Primer Mfg: Federal
Primer Size: LR Magnum
Primer Type: Gold Medal Match
Primer Lot Number: ?
Case Mfg: Remington
Case Length: 2.838
Case # Times Loaded: 1
Cartridge OAL: 3.650
Comparator OAL: 0.000
Av. Group size: 0.250
Av. Group Velocity: 3037
Cartridge Mfg Date: ?
Cartridge Lot Number: ?
Moly Coated: No
Crimped: No

Though it does nearly one-holers at 100 yards, this is what I've found it to do at 300. Still gotta work its way out further. This is under 2 inches at 300 yards and I'm happy thus far. This is my group of a scanned target so the quality isn't that great. I gotta remember to keep bring that digital camera!!!



Anyhow, I hope this helps out some of the guys interested in this cartridge. I'll let you know how things progress.