.308 Subsonic Barnes 175gr Cannelured bullets problems

Sivispacemparabellum022

Private
Minuteman
Jun 18, 2017
11
0
Ok so I was try various bullets in my savage. I recently bought Barnes 175gr LRX bullets they have cannelured groves in them. I had two squibs with them, but!!!!! Same loads also produced 750FPS to 1100FPS. I’ve done a lot of subsonic reloading but I’m at a dead end with this. Why such a speed difference with the same powder charge?
 

culater

Sergeant
PX Member
Minuteman
Oct 18, 2012
793
286
48
If it’s not working try something else. I would try the Hornaday 160 FTX. I get very consistent FPS. That what I used.
 

isofahunter

Get Tough or Die!
PX Member
Minuteman
  • Jun 11, 2010
    1,222
    1,473
    Hill Country of Texas
    Solid bullets are a unique animal and in my experience are best pushed hard for best result. I have found non boat tail and blunt tipped bullets work best in my subsonic loads. 170 gr 30-30 designed have provided superior results in my 308 and 300 blk using TB.
     

    Robinireland

    Vulcanologist
    Minuteman
    Jul 22, 2020
    22
    13
    Have you opened the primer flash hole to 2mm and run Magnum primers? Apologies if I’m playing an old record here.......

    I’ve only loaded subsonic specific projectiles (Lapua 200gn) and with 9.8gn TrailBoss coupled with the above case modifications and Magnum primers have have always produced excellent results.
    The advice I was given was to avoid projectiles not designed for subsonic use as you’d have too much surface area of the projectile being “driven”.
    However, with the advent of 300 Blackout and other subsonic specific calibres, I’m probably way out of date.
    Case in point, these 308/7.62 subs. Right side is my “normal” Lapua load, whereas the left hand round is a tad different. 6.3gn Autocomp behind a 178gn Hornady ELD. Case capacity is roughly half that of a normal 7.62mm cartridge.
     

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