Borrowed a chrony....

Discuss all aspects of Ammunition and Reloading here.
Branxhunter
.338 Lapua Magnum
Posts: 2223
Joined: Sat Dec 10, 2011 7:49 pm
Favourite Cartridge: .20-222
Location: South west Victoria

Borrowed a chrony....

Post by Branxhunter »

.... and found some interesting results.
image.jpeg
image.jpeg (145.69 KiB) Viewed 1483 times
First rifle was the Sako L461 .223 with 21" barrel, 25.5gn AR2206h and 55 Sierra Game Kings. Results were 2865, 3034, 3050, 2985, 3052 fps. No surprises that velocity is down a little given the short barrel. I can't go any higher as with an extra 0.5gn extraction becomes sticky (the primary extraction is worn).

Next was Sako A1 .222 with 24" barrel, 22.0gn BM1 and 40gn v-max. Results were 3108, 3023, 3023, 3018, 3113 fps. Nice and consistent but a bit lower than I was expecting. I was hoping for up around 3300. The highest charge I have loaded to previously is 22.2gn with no pressure signs so perhaps I can push them a bit more.

The third rifle was the Rem 700 .22-250 with 24" barrel, 37.5gn AR2208 and 50gn v-max. Results were 3762, 3738, 3765, 3762, 3765 fps. Here again the consistency was pleasing. This load is getting warm in my rifle so I don't think I will push it any further.

The last rifle was the Sako L461 .20-22 with 26" barrel, BM 1 and 32gn z-maxes. I tried a few charges but mostly only 2 rounds each (only had a few primed cases left). Results were:

23.2gn - 3811, 3808, 3857 fps
24.1gn - 3950, 3968 fps
24.4gn - 4026, 4075 fps
24.7gn - 4116, 4034 fps

Happy with those results! Will prep some more cases during the week and shoot some longer strings next weekend to get a better idea of the average velocity.
image.jpeg
image.jpeg (100.23 KiB) Viewed 1483 times
Marcus
User avatar
The Raven
Ultimate AusVarminter
Posts: 5945
Joined: Tue Feb 08, 2011 2:35 pm
Favourite Cartridge: .270 Win
Location: The Cloud

Re: Borrowed a chrony....

Post by The Raven »

I must be tired. Looked at that photo and thought it was from a shooting session I had yesterday....but none of us had a chrony...
User avatar
trevort
Spud Gun
Posts: 12710
Joined: Thu Sep 14, 2006 9:21 pm
Favourite Cartridge: Tater
Location: Melbourne

Re: Borrowed a chrony....

Post by trevort »

One of us did


Sent from my iPhone using Tapatalk
Waldo
.270 Winchester
Posts: 1254
Joined: Sat Aug 02, 2014 10:06 pm
Contact:

Re: Borrowed a chrony....

Post by Waldo »

Branxhunter wrote:.... and found some interesting results.

Next was Sako A1 .222 with 24" barrel, 22.0gn BM1 and 40gn v-max. Results were 3108, 3023, 3023, 3018, 3113 fps. Nice and consistent but a bit lower than I was expecting. I was hoping for up around 3300. The highest charge I have loaded to previously is 22.2gn with no pressure signs so perhaps I can push them a bit more.

Marcus
Yeh Marcus, you should be able to go a bit harder there. I got 3688fps with a little 40g Sierra in my .222 Rem and ended up settling on a load of 3520fps all using 2207.
User avatar
Camel
Ultimate AusVarminter
Posts: 12084
Joined: Sat May 28, 2011 8:51 pm
Favourite Cartridge: 20-222 6x47 rem, 250
Location: Northern Riverina NSW

Re: Borrowed a chrony....

Post by Camel »

The little 20 cal is humming, could you go to 25.0 gns, would be a nice round number. :wink:
Branxhunter
.338 Lapua Magnum
Posts: 2223
Joined: Sat Dec 10, 2011 7:49 pm
Favourite Cartridge: .20-222
Location: South west Victoria

Re: Borrowed a chrony....

Post by Branxhunter »

Camel wrote:The little 20 cal is humming, could you go to 25.0 gns, would be a nice round number. :wink:
I would need to use a drop tube - I am 2/3 up the neck at 24.7gn.

Marcus
User avatar
The Raven
Ultimate AusVarminter
Posts: 5945
Joined: Tue Feb 08, 2011 2:35 pm
Favourite Cartridge: .270 Win
Location: The Cloud

Re: Borrowed a chrony....

Post by The Raven »

trevort wrote:One of us did


Sent from my iPhone using Tapatalk
Must have been while I was sleeping in the shade :)



Sent from my iPhone using Tapatalk
kickinback
50 BMG
Posts: 3991
Joined: Sun Jan 07, 2007 11:54 am
Favourite Cartridge: 260 Rem
Location: Lilydale Vic

Re: Borrowed a chrony....

Post by kickinback »

Branxhunter wrote:
Camel wrote:The little 20 cal is humming, could you go to 25.0 gns, would be a nice round number. :wink:
I would need to use a drop tube - I am 2/3 up the neck at 24.7gn.

Marcus
I'll knock you up one if you send a case with those triggers.


Sent from my iPhone using Tapatalk Pro
User avatar
trevort
Spud Gun
Posts: 12710
Joined: Thu Sep 14, 2006 9:21 pm
Favourite Cartridge: Tater
Location: Melbourne

Re: Borrowed a chrony....

Post by trevort »

The Raven wrote:
trevort wrote:One of us did


Sent from my iPhone using Tapatalk
Must have been while I was sleeping in the shade :)



Sent from my iPhone using Tapatalk

Just being a smart arse. Technically I have a chrono I just didn't bring it with me. Next time


Sent from my iPhone using Tapatalk
User avatar
The Raven
Ultimate AusVarminter
Posts: 5945
Joined: Tue Feb 08, 2011 2:35 pm
Favourite Cartridge: .270 Win
Location: The Cloud

Re: Borrowed a chrony....

Post by The Raven »

trevort wrote:
The Raven wrote:
trevort wrote:One of us did


Sent from my iPhone using Tapatalk
Must have been while I was sleeping in the shade :)



Sent from my iPhone using Tapatalk

Just being a smart arse. Technically I have a chrono I just didn't bring it with me. Next time


Sent from my iPhone using Tapatalk
OK, corrected on both counts. You didn't bring it and you are a smart arse :D

Oh, stop mucking up the quoting.... :?
User avatar
trevort
Spud Gun
Posts: 12710
Joined: Thu Sep 14, 2006 9:21 pm
Favourite Cartridge: Tater
Location: Melbourne

Re: Borrowed a chrony....

Post by trevort »

I have to play to my strengths. I don't have many


Sent from my iPhone using Tapatalk
User avatar
Camel
Ultimate AusVarminter
Posts: 12084
Joined: Sat May 28, 2011 8:51 pm
Favourite Cartridge: 20-222 6x47 rem, 250
Location: Northern Riverina NSW

Re: Borrowed a chrony....

Post by Camel »

trevort wrote:I have to play to my strengths. I don't have many


Sent from my iPhone using Tapatalk

I still haven't seen one Trev, where do you hide them. :P :lol:
User avatar
Camel
Ultimate AusVarminter
Posts: 12084
Joined: Sat May 28, 2011 8:51 pm
Favourite Cartridge: 20-222 6x47 rem, 250
Location: Northern Riverina NSW

Re: Borrowed a chrony....

Post by Camel »

Branxhunter wrote:
Camel wrote:The little 20 cal is humming, could you go to 25.0 gns, would be a nice round number. :wink:
I would need to use a drop tube - I am 2/3 up the neck at 24.7gn.

Marcus
So I take it from that you haven't found any pressure problems so far ? :D
Branxhunter
.338 Lapua Magnum
Posts: 2223
Joined: Sat Dec 10, 2011 7:49 pm
Favourite Cartridge: .20-222
Location: South west Victoria

Re: Borrowed a chrony....

Post by Branxhunter »

Nope, no pressure signs so far.

Marcus
User avatar
Camel
Ultimate AusVarminter
Posts: 12084
Joined: Sat May 28, 2011 8:51 pm
Favourite Cartridge: 20-222 6x47 rem, 250
Location: Northern Riverina NSW

Re: Borrowed a chrony....

Post by Camel »

Stoke er up more then. :D Imagine this emoticon as stuffing powder down the tube instead of stiring shit :stir:
Post Reply