Main Menu
Newest Members
ScentBlaster, hutch6464, tailchaser93, mc2841, Bige18675
61688 Registered Users
Top Posters
dogcatcher 80974
stxranchman 52092
RWH24 44568
rifleman 44065
BOBO the Clown 41971
BMD 40612
bill oxner 37502
Big Orn 37484
txshntr 34253
sig226fan ( 31155
Forum Stats
61688 Members
46 Forums
425477 Topics
5871664 Posts

Max Online: 16728 @ 03/25/12 08:51 AM
Topic Options
#6493125 - 10/12/16 08:53 PM Subsonic 7mm-08 Rem - 160 grain SP
ChadTRG42 Offline
THF Celebrity

Registered: 09/16/09
Posts: 10495
Loc: Lewisville, TX
I finally had the chance to work up a good Subsonic 7mm-08 load with a Speer 160 grain SP bullet. Barrel was 20" long with a Shark Tiger Shark suppressor. Rifle was a semi custom Tikka build with a 9" twist (Thank you FiremanJG!). They were running right at 1040 fps, right where I want them.

Also why use a 160 grain Speer SP (soft point) flat base, instead of a BTHP, VLD or match bullet? When shooting at subsonic speeds, bullet stability becomes a huge factor for the bullet to properly stabilize and for it to shoot well. Bullet length is a major factor in how stable it is out of the muzzle. In a given twist rate (like a 1:10" or 1:9" barrel twist) and slow subsonic speeds, a shorter, flat base bullet is more stable than a longer BTHP or VLD match bullet of the same weight. The 160 grain Speer SP flat base is a much shorter bullet than a similar weight BTHP bullet, like a 162 A-max or 168 Berger VLD. This allows the 160 grain SP flat base to be more stable and have the potential to be more accurate at subsonic speeds than a BTHP design. Also, BC (ballistic coefficient) is for supersonic flight, and does not matter at subsonic speeds. Having a high BC bullet at subsonic does not benefit the shooter at all. This is why the 160 SP flat base bullets work well as subsonic round!

4 shot group and a 3 shot group during testing at 100 yards.

Type 01 and Type 06 FFL

#6493562 - 10/13/16 08:35 AM Re: Subsonic 7mm-08 Rem - 160 grain SP [Re: ChadTRG42]
FiremanJG Online   content
THF Celebrity

Registered: 12/16/08
Posts: 20090
Loc: Wolfe City, TX
My pleasure, Chad! It was a very productive range day.

Love hearing a sub hit paper. These loads are super quiet!

Think it was a 4.3 Mil correction, from a supersonic zero. Not too hard to remember that. Now we need to ear hole some hogs with them, you know for scientific purposes. grin

800 Yard Steel Range
Precision Rifle Instruction
Memberships and Classes Available


© 2004-2016 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide