The effect of too much twist and speed

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Singo85
Posts: 159
Joined: Tue Mar 08, 2011 11:04 am
Location: NSW

The effect of too much twist and speed

#1 Postby Singo85 » Sat Aug 11, 2018 6:21 pm

This is the end result of too much twist and too much speed.

7mm Jacko with 80gn of BMG powder....

https://youtu.be/H2PbpvIyqv4

Watch in High Definition.
Cheers
Michael "Machine Gun" Singleton

macguru
Posts: 1284
Joined: Wed Aug 05, 2009 9:49 am

Re: The effect of too much twist and speed

#2 Postby macguru » Sat Aug 11, 2018 10:11 pm

I have some 183 sierras for sale or swap :)

what you really need are these solids:
http://brtshooterssupply.com.au/product ... 50qty.html
Last edited by macguru on Sun Aug 12, 2018 8:58 am, edited 1 time in total.

Audax
Posts: 27
Joined: Wed Sep 27, 2017 8:48 am

Re: The effect of too much twist and speed

#3 Postby Audax » Sun Aug 12, 2018 5:50 am

Walker Flatline will be OK if you are not shooting under ICFRA rules

ICFRA rule F2.20.
Ammunition may be commercial or handloaded but loaded in a manner consistent with the ammunition industry’s accepted standards; must be safe to fire in the rifle for which it is intended and must meet in all respects the limitations of any range regulations (e.g. calibre, velocity, muzzle energy etc.). Even if permitted thereunder, prohibited bullets will be those having a core consisting of steel, hardened material, depleted uranium, incendiary or tracer compounds. Also prohibited are bullets of monolithic construction or those having a discarding jacket/sabot.

RDavies
Posts: 1934
Joined: Sun Feb 12, 2006 7:23 pm
Location: Singleton NSW

Re: The effect of too much twist and speed

#4 Postby RDavies » Sun Aug 12, 2018 3:15 pm

Audax wrote:Walker Flatline will be OK if you are not shooting under ICFRA rules

ICFRA rule F2.20.
Ammunition may be commercial or handloaded but loaded in a manner consistent with the ammunition industry’s accepted standards; must be safe to fire in the rifle for which it is intended and must meet in all respects the limitations of any range regulations (e.g. calibre, velocity, muzzle energy etc.). Even if permitted thereunder, prohibited bullets will be those having a core consisting of steel, hardened material, depleted uranium, incendiary or tracer compounds. Also prohibited are bullets of monolithic construction or those having a discarding jacket/sabot.

Yes, not allowed in F class, but how about Fly shoots or long range benchrest?

macguru
Posts: 1284
Joined: Wed Aug 05, 2009 9:49 am

Re: The effect of too much twist and speed

#5 Postby macguru » Sun Aug 12, 2018 3:18 pm

I was thinking that Stuart would not sell them unless they could be used in benchrest shooting, which is of course the purpose of mike's rifle...

Wal86
Posts: 163
Joined: Sun Nov 20, 2016 5:10 pm
Location: Kilmore, VIC

Re: The effect of too much twist and speed

#6 Postby Wal86 » Sun Aug 12, 2018 4:17 pm

What twist are you running singo? And at what velocity ?

Singo85
Posts: 159
Joined: Tue Mar 08, 2011 11:04 am
Location: NSW

Re: The effect of too much twist and speed

#7 Postby Singo85 » Sun Aug 12, 2018 6:44 pm

It is a 8.5 twist....175 sierra at 3270fps.
Cheers
Michael "Machine Gun" Singleton


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