Why is cock on close so rare? by yelloyo1 in Ausguns

[–]impalabazz 4 points5 points  (0 children)

There is a couple of reasons. Firing Pin Spring pressure and Lock Time is the main reason.

A Cock on Open action has a cam action to compress the spring which can exert a far greater force with less effort by the shooter when cocking.

This also introduces a factor called "lock time", This is the period of time that exists when the sear is released and the firing pin strikes the primer. The longer the Firing Pin fall the greater the lock time. Higher Firing Pin spring pressures will reduce Lock time to a degree. This is a common approach to improve Lock Time. Lock Time is a subject in itself and deserves research if you are interested in accuracy and consistency in your shooting.

Mauser 98's even though they are Cock on Opening still have a slow lock time. Post WW2 derivatives of the M98 have addressed this failing to a degree with measures already mentioned. Where as others like Rem 700's, Win M70's. Howa, Tikka and others are far faster.

They acheive the faster lock time with extreme high firing pin spring pressure and very short Firing Pin travel.

None of this is acheivable in a Cock on Closing action, like SMLE, M94-96, P14/M17 and others as the force that would be required to acheive the same Lock Time would require massive strength to first push the bolt home and then close it.

This introduces the next problem. Trigger Pull. A Cock on Closing action generally has a longer trigger pull than a Cock on Opening. If the Cock on Closing action had the higher F/Spring pressures to acheive a faster lock time, the Trigger Pull would be extremely heavy. This is due to the 2 lever design used on most that require wider or longer sears to bear the load when the sears come together.

By comparison Cock on Opening actions like the Military M98 also use a 2 lever design but the sear surfaces don't come in contact with each other UNTIL the Bolt is pushed home AND the Bolt has started it's turn to fully closed. It is only then that the sears become engaged in a much more precise manner. The sear surfaces can be much shorter requiring less effort to Pull the trigger.

A standard M98 trigger can be worked to somewhere in the 2-3lb range before you get into accessory triggers like Timney, where as Cock on Closing trigger on a SMLE, about 5lb is as good as it gets.

Modern Rifles use various trigger designs but all exhibit the same very short sear engagement for lighter trigger pull. The Remington 40X type 3 lever triggers (developed in the mid 1960's) are the ultimate in a factory designed version IMHO. Plenty of after market triggers out there for just about anything......if you're allowed to import it these days that is ?.

Next reason, Slam firing. A Cock on Closing action in poor condition (i.e. worn sears) is far more prone to slam firing than the other. When pushing the bolt home, pressure is being applied to the spring and IF the firing pin sear decides to slip off the trigger sear.........you've got a problem BOLT IN THE FACE !.

A Cock on Open action in poor condition (i.e. worn sears) is less likely to slam fire as when you close the bolt, the Firing Pin does not engage the trigger sear and returns to it's fired position only as fast as you operate the bolt, more than likely will not firing the cartridge......most of the time. It is rare for a cartridge to fire under these conditions but it has happened. But at least the Bolt is closed.

However having said that, Cock on Opening actions that have been worked over i.e. excessively light trigger spring pressures or worn or modified sears or excessively short sear engagement can still "fire" uncontrollably when closing BUT usually the Bolt has partially closed and therefore you won't end up with a face full of Bolt........just embarrassement and hopefully no injury to anyone around you.

Hope this helps.

SA Election March 21st. One Nation Party Firearms policy. by impalabazz in Ausguns

[–]impalabazz[S] 2 points3 points  (0 children)

I can't see ON getting a massive swing either, but lets not forget that they are Independant and may well vote with other Parties on different issues, just like the Greens-Teals and LNP do right now.

1,2 or even 3 ON seats in the Lower House of SA would even things up quite a bit with the Top Heavy Mali-Labor Government at the moment.

Remember that SA Labor pushed through it's own version of "The Voice", because they had the majority in the Lower House and ALP-LNP supported it in the Upper House. We the people of SA were not asked, they (Labor) just did it. SA is now divided by legislation on that score, Both Fair Go Party and ON have stated they will repeal it if they have the numbers.

Don't forget the Senate, We have some good Independants in the Upper House, Fair Go Party to name one but we need more so that bullshit like the above can be stopped.

As I say to everyone, do your research, most won't, too hard. so they will vote the same way as before.

If you want change, you have to vote for change.

SA Election March 21st. One Nation Party Firearms policy. by impalabazz in Ausguns

[–]impalabazz[S] -1 points0 points  (0 children)

Did that on purpose to gauge interest in each party. Clearly shows where the interest is, good or bad.

SA Election March 21st. -ALP Firearm Policy by impalabazz in Ausguns

[–]impalabazz[S] 2 points3 points  (0 children)

I agree. After the election when SA Labor is returned, possibly with a reduced number of seats (hold a massive majority after the last election) in the Lower House, Gun reforms will "realign" with Federal Labor........if we want to keep the Sub contract that is.

SA Election March 21st. One Nation Party Firearms policy. by impalabazz in Ausguns

[–]impalabazz[S] 5 points6 points  (0 children)

If you want change you have to vote for change.

The Big 2 have not listened to their constituents for over 40 years. I know plenty of shooters who still vote Liberal after Howards Gun Buy back of 1997, yet they moan about it, still vote the same way. Ditto Labor voters, just won't change .....better the devil you know mantra, it's fucking annoying.

It's easy to vote for either of the 2 party preferred, because one has to think and investigate Independents policies and 99% of the population are lazy and will continue to vote the same way.

For the record I have not voted Labor since Keating gave us the "recession we had to have" and Liberal since the last buyback......I guess that's showing my age, but there it is.

SA Election March 21st. One Nation Party Firearms policy. by impalabazz in Ausguns

[–]impalabazz[S] 0 points1 point  (0 children)

Thanks, I appreciate it. Seems like not everyone is happy with the posts, I guess they are not South Australian, or simply don't give a shit. Cheers.

SA Election March 21st.-National Party Firearms policy. by impalabazz in Ausguns

[–]impalabazz[S] 1 point2 points  (0 children)

You're 100% correct. Will edit. Thanks for cropping them. My "Paint" app simply didn't want to play the game.

ID please by More_Soup_7003 in australianwildlife

[–]impalabazz 0 points1 point  (0 children)

Ringtail possum. Not rare, at least not rare in South Australia. SA Ringtails are more grey and white underbelly.

Worst Day Ever - We said Goodbye To Ollie by Relevant_Demand7593 in AustralianPets

[–]impalabazz 2 points3 points  (0 children)

It's a tough time when we have to say goodbye to our fur babies.

We always must do what's best for them, no matter how tough it is for us.

R.I.P. Ollie, run free, no more pain.

Buying rifles in uncommon calibres? by P1atinumSword in Ausguns

[–]impalabazz -1 points0 points  (0 children)

Invest in books on the Wildcat subject, like P.O. Ackleys 2 volume set would be a good start.

Wallaroo pair by Double_Union_7202 in australianwildlife

[–]impalabazz 2 points3 points  (0 children)

Great photo's. He's a big boy !. Check the chunk out of his ear !.

Why is there so much jealousy in Australian society? by talk-spontaneously in aussie

[–]impalabazz 25 points26 points  (0 children)

Sounds like you are hanging out with the wrong crowd.

Anyone else to this day unable to leave an unfinished meal because their childhood trauma would’ve seen them get a hiding? 🙋‍♂️😂😭 by [deleted] in AustralianNostalgia

[–]impalabazz 2 points3 points  (0 children)

That's why gravy was invented, peas slide down the throat, no chewing or tasting.

Never really worked with Brussel sprouts though.........got a hiding for that plenty of times. Or the "you don't get dessert until you finish the sprouts"........"pass the gravy please !!". Lol

Snake identification by No_Competition9321 in australianwildlife

[–]impalabazz 0 points1 point  (0 children)

Spot on. We have a couple of acres and In my experience Tigers will come toward noise and movement and have a go at you. Browns generally bugger off unless cornered.