Well if your a competitive shooter, you will naturally be grasping for every leaf that floats down stream in hopes of improving your results.
Especially if all the top dogs are doing it.
I feel there is little doubt that consistant neck tension is better than the opposite.
But lets not also get carried away with the idea that all is lost if we dont anneal our cases, especially for hunters, including L/R hunters.
As recently as 25 years ago most of us didnt even know anybody owning a chronagraph.
Now it is on the must have list.
Ten years ago most werent familiar with the term (annealing) either, but now ditto with that.
Being from Pa, im very familiar with the worlds first 1000 yd benchrest club from its inception.
And ive known quite a number of the shooters who have competed there, including some of the record group holders.
In as i recall 1986, a late friend by name of Earl Chronister set a new heavy gun 10 shot record of roughly 3.25 inches. I know Earl didnt anneal any cases.
The modern record now closing in on 10 years, beats Earls old record by about a whopping half inch.
But i frankly dont know if that record was with annealed cases or not.
So we can see just how far weve come here by way of accuracy, at least for 10 shots.
I frankly do now use a manually operated fairly inexpensive system which uses 2 torches.
And i use 750 deg Tempilac on the case neck as a reminder when to flip them.
Does it give me longer case life?
No it dosent, because i still lose the primer pockets with the same number of firings.