7mm 110gr TTSX keyholing

[Rflshootr]

If it is a factory barrel it should have enough twist. It should be either a 9 or a
9 1/4 twist depending on the year it was manufactured. Reference from Sierra bullets......

RifleTwist_

7mm Remington Magnum - 1 in 9" Husqvarna; Remington 40-XB, 700 (1969); Magnum Research Mountain Eagle; Thompson/Center

7mm Remington Mag. - 1 in 9 1/4" Remington 700

7mm Remington Mag. - 1 in 9 1/4" Savage 110, 111, 112, 114, 116; Sako; Winchester 70, 770; Ruger 1, 77 (old); Mossberg; Browning A-Bolt II, 81 BLR; Weatherby Mark V

7mm Remington Mag. - 1 in 9 1/2" Ruger (present); Savage (present)

7mm Remington Mag. - 1 in 10" .Browning; FN; Harrington & Richardson 300; Musketeer; Schultz & Larsen; Browning BAR Mark II; Weatherby Vanguard

I'd suspect the ammo.

 

[hawlejr]

I suggest you Mic the bullets. I'll assume you don't have any doo-dads like muzzle brakes, suppressors, etc on the end of the barrel. I would suspect possibly wrong (like .270?) bullets. Try some regular bullets (lighter the better) with a light load similar to what you're using with the coppers. If they keyhole, then you've likely got a bad barrel. I had keyholeing problems with long .257 bullets in a .257 Weatherby which had the old 12" twist. I've never had those problems with short (for twist) bullets. Lately, I've been playing around with .22 Sabots in my 30-06. The longer .22 bullets (which probably need 1-8 or 1-7" twist, go through the paper sideways like your example with a 1-10" twist. The 45-50 grainers do ok if I really load them up causing the sabot to separate quickly just outside the muzzle.

 

[skipglo]

I believe so, the first two were lower right so my Dad adjusted it over to the left and then shot the other two.

The rifle hasn't been shot in about 15 years and it was basically new at that time. Has less than 60 rounds thru it.

Maybe that's why !