I understand the quality of barrels that make them accurate. I also understand triggers, stocks and rests helping to get the most consistency out of a gun. What I don't understand is what makes an action so important to BR accuracy. Is it simply the weight, or bulk? Or the bolt/lugs? What makes a top action (e.g. 40X, Annie 54, Suhl, etc) so crucial to bench rest accuracy?
Appreciate facts and even opinions.
Thanks,
Regis
Just to stir the pot a little. A heavy barrel such as on the Remington 40Xs and 40XBs needs the tenon to be a half inch longer and 1 1/8 dia threads to support the barrel properly. I think that is why a lot of the standard barrels shoot just as well as the heavy barrels This is just my opinion so take it for what you paid for it. Wayne
Well....if we're gonna have a conversation, stir the pot some more. I have no idea where you heard that but it's flat wrong. The 1 1/8" tenon is a by product of the fact that the receways were broached from the front and the tooling required a hole that big. That said, some of the best shooting 40X's happened when guys figured out how to thread a bushing into the action resulting in a 3/4" tenon and eliminating the stepdown of the barrel. This carried over to the Swindlehurst actions and obviously barrel support was not a factor.
This comes directly from the guys that invented the 40X, Mike Walker and Jimmy Stekl.
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Good actions have good concentricity between bolt and barrel threads, have good bolt body to action body fit, their lugs bear evenly on their abutments, their bolt faces and front receiver ring faces are square to the action's CL, the firing pin hole and pin are a good fit, their striker assemblies have no unnecessary drag, and deliver energy to the primer with the least vibration and within a narrow range of energy. They are well timed, trigger to striker, bolt handle to action body, and lugs to closing cams. Beyond the things that can be easily measured there is the issue of residual material stress. Less well known, the effect of action hardness. Generally there are also the matters of stiffness, and bedding area, although it is common that too much importance is given to the former and too little to the latter. Last but certainly not least they must be configured to accept the best available triggers.
I can understand most all of that. Bolt face/squareness and bolt to lugs fit and bedding was pretty much all I could think of. Never gave a thought to firing pin even though I have seen in the past, evidence inconsistent firing pin strikes.
Thank you very much for the education.
Regis
Ignition is the advantage most custom actions have over OEM and is the major reason say in selecting a Anschutz 54 action the older Wing Safety action is more desirable than the new actions because the wing safety has better ignition if properly done! You can get one shot that is not ignited well and get a 50 in ARA and loose the match ,too risky to go that way , it took me a while competing to realize that ignition is that big of culprit! I have every action there is ,Many 40X`s ,Suhls and Customs ....I shoot a Flash Ebert Turbo cause day in ,day out they produce the best ignition in RF!
Tim;
I'm just guessing here but I am pretty sure we are going to find out that the barrels the swindelhursts were using were not the same size and weight as a remington heavy barrel profile. Am I right or wrong?
Wayne
If you look at results world wide from the last couple of years there is a trend with which brand of action works best with which brand of ammo. But as with all things rimfire there is always exceptions to the rule, like the last 2 world championships were won using a Falcon action and who would of predicted that.
With Eley all the best scores are with actions with big hit firing pins.
Lapua best results from not such hard firing pin hitters like Falcons and worked over Anschutz.
RWS best results have been with lighter hit actions like Halls and Anschutz.
This wouldn't apply to all results but it would be above 90% of results world wide.
Peter
If you look at results world wide from the last couple of years there is a trend with which brand of action works best with which brand of ammo. But as with all things rimfire there is always exceptions to the rule, like the last 2 world championships were won using a Falcon action and who would of predicted that.
With Eley all the best scores are with actions with big hit firing pins.
Lapua best results from not such hard firing pin hitters like Falcons and worked over Anschutz.
RWS best results have been with lighter hit actions like Halls and Anschutz.
This wouldn't apply to all results but it would be above 90% of results world wide.
Peter
There is nothing but coincidence here. There is absolutely zero in the way of actual data to subscribe to that theory of action type vs ammo.
If I'm not mistaken, once you leave the US,a major componant of what's used is largely what is possible to get your hands on.
If you look at nothing but total matches shot here in all disciplines which likely greatly outnumbers your data base, you come up with zero correlation to your assumptions, plus there is not even a whisper of that among the top builders. What's that tell you?
This may ge true but what does it have to do with the initial post? Last I heard Alan Hall does'nt make rifles and you can grow old and grey looking for matches won by factory Anschutz' .
Another thing I have noticed is those who think they have all the answers never seem to win a big match and never improve and those with an open mind who are constantly looking for way to improve alway seem to get better.
Peter
Another thing I have noticed is those who think they have all the answers never seem to win a big match and never improve and those with an open mind who are constantly looking for way to improve alway seem to get better.
Peter
