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  #1  
Old 10-14-2020, 12:33 PM
AlbertaAl AlbertaAl is offline
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Default 20PPC w/55gr Berger.... thoughts?

My 12 year old SAKO AI HB single shot 20PPC needs rebarreling.

Intended to build a 20BR to shoot my stock pile of 55gr Bergers but since this SAKO needs a replacement barrel then I thought to explore the possibility of a 20PPC shooting 55gr Bergers

The barrel length would be 24 inch
The accuracy and bullet performance isn't being questioned, just wondering where the velocities might result. Can I get 3550/3600 or more ?

Past performance of this rifle 20Cal x 35 or 40 gr Bergers was limited to 450 yards on coyotes with clean kills. The old Hdy 33 gr. bullet was awesome.

Last edited by AlbertaAl; 10-14-2020 at 12:38 PM.
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  #2  
Old 10-14-2020, 01:18 PM
L.Sherm L.Sherm is offline
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I think it would gall in the 3500-3600 range for speed.
I would keep the freebore short and go 9 twist.
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  #3  
Old 10-14-2020, 06:34 PM
AlbertaAl AlbertaAl is offline
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After posting this I realized myself that staying with the 20BR is best !
I have the original factory 6PPC barrel and will just put that back onto this SAKO AI
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  #4  
Old 10-14-2020, 06:51 PM
L.Sherm L.Sherm is offline
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There is no doudt the 20BR is the best option.
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  #5  
Old 01-01-2021, 08:38 AM
rfurman24 rfurman24 is offline
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Over 3500 is hot for a 20BR with 55s in a 26". The 20PPC is not going to get there.
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  #6  
Old 01-01-2021, 11:53 PM
RareBear RareBear is offline
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Perhaps a 20 Dasher would have enough case capacity to get there?

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  #7  
Old 01-02-2021, 02:32 AM
L.Sherm L.Sherm is offline
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20 Dasher and 20BRA will be in the 3750- 3850 range with 55's
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  #8  
Old 01-02-2021, 03:07 AM
AlbertaAl AlbertaAl is offline
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Default 20-250 ?

I've been rethinking the use of 20Cal x 55gr bullets in a repeater tactical sporter style.
I keep looking at the SAKO 85 varminter 22-250 as a donor.
These rifles come in stainless steel with a laminate stock... not exactly a tactical sporter as it stands.
Thoughts are to use the action with bottom metal/magazine. The 22-250 barrel and factory stock will be resold or stored.
These are attractive silky actions with an excellent SET trigger.
I know this will FEED the 20-250 cartridge.

The 22-250 parent cartridge is readily available brass and reducing to 20Cal won't require neck turning.
The case will provide easy resizing with plenty of powder capacity and give the Horse Power to send the 55's down range at high velocities.
I might even make it a 20-250 x 40degree (ackley) since I'm ordering a custom reamer anyway and already have the 22-250 Ackley dies
I'd expect reaching 3900 fps as being very easy to do.

Last edited by AlbertaAl; 01-02-2021 at 12:39 PM.
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  #9  
Old 01-06-2021, 04:12 PM
Mntngoat Mntngoat is offline
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or .20 x 47L
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  #10  
Old 01-06-2021, 04:29 PM
B23 B23 is offline
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With a fast twist 20-250 slinging the 55's likely having a relatively short throat/barrel life I'm not sure I'd want to use up much of it fireforming one to a 20-250AI. Instead maybe neck down ADG 22 Creedmoor brass to make a 20 Creedmoor which would be a near twin but without the fireforming.

When I had my 20-250 built a couple years ago my smith and I figured barrel life would be around 600-ish and with it taking 6+ months just to get a 8tw 20cal Krieger barrel I ordered two barrels right from the start.
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