AusVarmint

G'day All,

Just wondering whether any of you are using the Tubb speed lock firing system. I'd be interested to hear whether they are in fact quicker and worth the investment?

Regards

Sean

I have one in my 22BR,cant tell if it makes a difference and yes I have swapped the std one back into it to try and tell.........................................but in my mind I know its there so the Tubb has to be better .
Ps when they are side by side the Tubb looks better as the spring is not all bound up and dont drag on the inside of the bolt like the std one does.


Regards Chris.

I've just purchased one and am going to fit it to my HG build (I can't believe the money I've already spent and still only have a pile of bits).

Wrong place.

Let's step back for a minute here. Years ago the high speed titanium pins and super strong springs were the rage and a must have. Apparently. Not so with more information coming out now that a heavier firing pin and obviously slower one is producing more consistent and reliable ignition. Some very current actions are being fitted with weighted pins to achieve this.
Now this holds for BR, but not for offhand shooting where a fast lock time is an advantage. Remember Tubb is a positional offhand shooter as well as prone Highpower. I think if you did a ring around of a number of BR shooters around the country, they would probably give you their old Wolfe titanium kits.
When i did aJRs action in 2003 i purposely slowed the locktime down and increased the pin weight with a pre-load of around 19 lbs. Standard Rem 700 is 26 lbs with a recommendation that anything under 16 lbs is considered unreliable. Many Stolle's were lowered to this 16 lbs or thereabouts to make for an easier bolt lift and i dare say i don't hear of any issues with them.
My actual recommendation, and i see HG mentioned so i'm thinking BR, is to go the other way. Slow it down, increase the pin weight. Somewhere on BRC there is a thread that specifically dealt with this issue and has some very good information and how to's about current actions. The BAT 3L in particular IRRC.

As a side note, when Vaugnn was alive he talked of primary vibration induced by the action of the action releasing its stored energy and the effect it would have on the moment of inertia on the muzzle. His conclusion, through theory, not actual demonstration, was that the more energy stored had to go somewhere and by his reckoning in bullet dispersion eventually. Shehane took this even further with a strong belief that if you ran the string of shots too fast in a HG, the vibration from the previous shot was still present in the barrel as the next shot was being fired, producing a flier. I suppose this is why he went to a block with Durathane as the setting compound to kill off both primary and residual vibration. Durathane for those that don't know is the substance skateboard wheels and shock absorber rubbers are made of occasionally.

Now that is some really interesting information Tony, it wont be any good to me, but I found it interesting, and it shows just how much thinking actually goes into BR shooting. Thanks

Tony,

Thanks very much for your reply. As always it has been very informative. I'll now have a serious rethink on having this fitted.

G'day Tony,


Intersting stuff hey,Garry Ocock was/is one of those whom modifies the Bat actions,it seems that a combination of Short action/short firing pin amounts to less pin travel coupled with less spring tension for ease of bolt lift =inconsistent ignition.
Pretty sure one of the mods that was being carried out involved tungsten weight being added to the mass of the pin assy,would no doubt slow the lock time down.................slightly but consistent ignition is more important.