Gamerancher wrote:I like my Sako's, I have 6 of them. Haven't really looked at the A7, I know they were built as a budget line to compete in that market in the U.S.
Looks like the result of letting a "daddy" Sako spend some time with a "mummy" Tikka and you get "junior"
bobnob wrote:Gday SHV, great minds think alike they say...
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Picked up the same in 308 Win two weeks ago.
Three different loads at 260y over my bench, using 168g Amax and R17...
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LOVE the trigger, stock suits me down to the ground and it's light without being so light it can't be held steady.
I can load ammo out 2.907" in the mag and the chamber / throat dimensions are SNUG which is never bad, and not common for a 308.
bobnob wrote:Yes mate all those groups are Amax and three different charges of Reloder 17. OAL is 2.898 which has the bullet kissing square on the lands. Not pushing in so far that it's jammed, just a good square kiss on all of the lands.
FC brass if you're wondering.
R17 can do amazing things with moderate to heavy bullets in the 308 Win if you can get enough into the case. 49g leaves about 3mm of room between the top of the powder and the case mouth and that's where I stopped because it was fast enough for me. 2800fps is not out of order though in the 22.5" bbl if one was inclined to lean on it, which isn't really my go.
Gwion wrote:Mate. At 50m, those loads in the top photo are showing quite a large variation. As you say, getting out to 100m would be ideal for further testing. Still, looks like you are on a winner with both of the 40.2 & 42.6 loads but i'd personally stick with the 40.2 as they look most consistent.
Good work. Get them out to 100m and shoot a bunch of groups to confirm.
What is your intended use for the loads? If you really want that extra velocity, i would actually give 42.2 a run as 42 & 42.4 both have a similar POI but 42.8 is high and ever so slightly to the right of the previous loads which may indicate why the 42.6 is displaying a little left to right stringing. It could just be you as the variable but it is hard to tell from 50m groups.
How far off the lands are you loading?
SHV wrote:How far off the lands are you loading?---sorry out of new shooter's knowledge range you mean how far to the bullet touch the rifling?
sungazer wrote:The high rings will actually help with some of the torque, or twist of the rifle when fired. The higher point of momentum dampens the twist.
sungazer wrote:It is a proven effect. not sure where I could point you to off the top of my head though. A lot of competition shooters also shoot with very little check weld or none at all, so that is not really an issue. Think of a tight rope walker using a long pole for balance. It is the length of the pole that changes the point of momentum that helps steady him. It was shown very often in different ways on the TV show "The science of being stupid".
bigfellascott wrote:Any of those results will be good enough to hunt with, pick one and go huntin, no need to waste more time and money for bugger all diff down the pointy end results wise.