is a .310" cast-lead projectile in a 308 bolt-gun safe?

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is a .310" cast-lead projectile in a 308 bolt-gun safe?

Post by in2anity » 12 Oct 2017, 8:43 am

They're technically 165grBB "hard-cast" coated projectiles (~18bh) meant for the 30/30, but I'd like to plink them through my Tikka 308. Would this projectile be safe to shoot considering they are technically 2 thou too large for the 308?

Regards,
In2.
Last edited by in2anity on 12 Oct 2017, 9:45 am, edited 3 times in total.
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Re: is .310" cast-lead projectile in a 308 bolt-gun safe?

Post by Tripod » 12 Oct 2017, 9:00 am

Perfect.
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Re: is a .310" cast-lead projectile in a 308 bolt-gun safe?

Post by bladeracer » 12 Oct 2017, 11:26 am

in2anity wrote:They're technically 165grBB "hard-cast" coated projectiles (~18bh) meant for the 30/30, but I'd like to plink them through my Tikka 308. Would this projectile be safe to shoot considering they are technically 2 thou too large for the 308?

Regards,
In2.


No problem at all. Even jacketed bullets would work, but with higher pressures.
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Re: is a .310" cast-lead projectile in a 308 bolt-gun safe?

Post by in2anity » 12 Oct 2017, 11:48 am

Ok good to know, I also found this: "The pressure required to swage bullets down from 0.310" to 0.308" is only a couple hundred PSI or so. In a .308 Win, where pressures are around 60,000+ PSI, this pressure is inconsequential" - and considering my 10gr TB loads will only cause around 30,000psi, there shouldn't be any pressure risks.

For the record, here's a happy-snap of my prototype bullet next to a 178gr ELD-X:

lead.jpg
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Re: is a .310" cast-lead projectile in a 308 bolt-gun safe?

Post by BRNO_Bigot » 12 Oct 2017, 2:12 pm

Yea, I wouldn't be loading lead bullets to 60,000 PSI eaither.

I would have absolutely zero qualms about loading them up with a TB.

Let us know how your experiments go.
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Re: is a .310" cast-lead projectile in a 308 bolt-gun safe?

Post by chrispy » 14 Oct 2017, 1:53 pm

Cast bullets need to be a couple of thou larger to effect a gas seal. Undersized cast pills will lead to gas bypass, gas cutting, bore erosion and leading.
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Re: is a .310" cast-lead projectile in a 308 bolt-gun safe?

Post by reloader762 » 14 Oct 2017, 9:44 pm

As stated cast lead bullets PC or not are generally .001 to .002" over the groove dia. of your rifles bore vs. jacketed bullets. Many caster will size the bullets to fit the rifles throat or that will easily chamber which can be even larger in dia. I actually size all my 30 cal. bullets like those for my Sav. 30-30 an Sav. 99 in 300 Sav. to .311" they chamber easily and shoot very accurately as well.
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Re: is a .310" cast-lead projectile in a 308 bolt-gun safe?

Post by in2anity » 15 Oct 2017, 10:30 am

reloader762 wrote:As stated cast lead bullets PC or not are generally .001 to .002" over the groove dia. of your rifles bore vs. jacketed bullets. Many caster will size the bullets to fit the rifles throat or that will easily chamber which can be even larger in dia. I actually size all my 30 cal. bullets like those for my Sav. 30-30 an Sav. 99 in 300 Sav. to .311" they chamber easily and shoot very accurately as well.
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Yeah I’m hoping for accuracy like that - my marlin shoots them O-K, but could be better. What powder you using there?
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Re: is a .310" cast-lead projectile in a 308 bolt-gun safe?

Post by reloader762 » 16 Oct 2017, 1:42 am

16 grs. of Alliant 2400 or what is known as the Universal Load for 30 cal. rifles.
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