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Forum Index > Rifles general discussion > Keyholing & terminal performances - 303 British

Keyholing & terminal performances - 303 British

23 Nov 2021
@ 03:24 am (GMT)

LR S

Hi everyone,
I'm about to buy an all matching SMLE at a very low price. So far, so good.
The downside of that rifle is its bore (ain't all that surprising for a rifle this old), there's basically no rifling at the muzzle anymore and it's keyholing at 15-20 meters already - but it still somehow does decent groups. Ive shot factory (S&B) and reloaded ammunition through it, got the same results on target with both.

> What kind of terminal ballistics can I expect from a keyholing 303 SP/FMJ on medium sized game (boars) at short to very short range (dense woods)?

I gathered from my readings that a bullet tumbling shortly after impact can have dramatic effects and achieve good penetration but I've never read about bullets tumbling beforehand, mid-air... can I expect just as good or maybe marginally better performances? How likely would it be for the bullet to be deflected and exit the game early on at a weird angle, therefore having little effect on the game (compared to a normally stabilized bullet)?

I'd be very glad to use that rifle for hunting as-is, without having to counterbore or rebarrel it, even if it means that Ill have to limit the range of my shots

Replies

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24 Nov 2021
@ 06:17 am (GMT)

Scott Struif

Re: Keyholing & terminal performances - 303 British
A gunsmith near me charges $75 USD to cut and crown a barrel, so I’d probably try that first. However, after reading the 223 Remington Knowledgebase article on this site about the effectiveness of tumbling 62 grain FMJ bullets on medium game, I had the same question when I tried some long-for-caliber Nosler E-Tips in a larger caliber and noticed a little keyholing. There’s a US bulletmaker, Ft. Scott Munitions, that produces an all copper bullet advertised to tumble on impact. The bullet supposedly bends at the ogive. I hadn’t noticed at first that the Knowledgebase article on the 223 states that the FMJ bullets actually do come apart, the core separating from the base of the bullet, adding to the destructiveness.
24 Nov 2021
@ 03:04 pm (GMT)

Lane Salvato

Re: Keyholing & terminal performances - 303 British
LRS, what are planning on doing if you wound an animal and have to make a follow up shot at a longer distance?
25 Nov 2021
@ 11:18 am (GMT)

Lane Salvato

Re: Keyholing & terminal performances - 303 British
Quote:
A gunsmith near me charges $75 USD to cut and crown a barrel, so I’d probably try that first. However, after reading the 223 Remington Knowledgebase article on this site about the effectiveness of tumbling 62 grain FMJ bullets on medium game, I had the same question when I tried some long-for-caliber Nosler E-Tips in a larger caliber and noticed a little keyholing. There’s a US bulletmaker, Ft. Scott Munitions, that produces an all copper bullet advertised to tumble on impact. The bullet supposedly bends at the ogive. I hadn’t noticed at first that the Knowledgebase article on the 223 states that the FMJ bullets actually do come apart, the core separating from the base of the bullet, adding to the destructiveness.



Scott, before going too far with that bullet maker in Florida, perhaps reviewing this article would be in order. It comes from my favorite outdoor writer: https://www.ballisticstudies.com/Knowledgebase/Homogenous+copper+bullets+can+be+inhumane.html
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