AusVarmint

.... and found some interesting results.
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.
Marcus

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...

One of us did


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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.

The little 20 cal is humming, could you go to 25.0 gns, would be a nice round number.

Camel wrote:The little 20 cal is humming, could you go to 25.0 gns, would be a nice round number.

I would need to use a drop tube - I am 2/3 up the neck at 24.7gn.

Marcus

trevort wrote:One of us did


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Must have been while I was sleeping in the shade



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Branxhunter wrote:

Camel wrote:The little 20 cal is humming, could you go to 25.0 gns, would be a nice round number.

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.


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The Raven wrote:

trevort wrote:One of us did


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Must have been while I was sleeping in the shade



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


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trevort wrote:

The Raven wrote:

trevort wrote:One of us did


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Must have been while I was sleeping in the shade



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


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OK, corrected on both counts. You didn't bring it and you are a smart arse

Oh, stop mucking up the quoting....

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


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


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I still haven't seen one Trev, where do you hide them.

Branxhunter wrote:

Camel wrote:The little 20 cal is humming, could you go to 25.0 gns, would be a nice round number.

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 ?

Nope, no pressure signs so far.

Marcus

Stoke er up more then. Imagine this emoticon as stuffing powder down the tube instead of stiring shit