Bulldog modification log .328 porting and more

[PCPhack]

Straight to the side or towards the thin line. We do need to make sure it doesn't retract too much, or the scalloped bolt tip will not seal past the barrel oring. I can make more precise measurements when it is back apart soon for the titanium reservoir. It is hands off time now, as I go hunting in a few days. 

[PCPhack]

Travis, as I suspect you guys have a CNC professional lever coming, please consider to incorporate this idea of a longer nub to the side which will cause slugs to seat slightly deeper, and also will retract the bolt a little more. Everyone could gain a little power from it. Actually, with that nub change, one can keep the factory linkage piece while still achieving deeper seating as well as retraction.

[Kinetic45^]

Travis, as I suspect you guys have a CNC professional lever coming, please consider to incorporate this idea of a longer nub to the side which will cause slugs to seat slightly deeper, and also will retract the bolt a little more. Everyone could gain a little power from it. Actually, with that nub change, one can keep the factory linkage piece while still achieving deeper seating as well as retraction.

+

[oldpro]

 What ever it takes to make it work the best! I got your backs Guys Im listening.

[Kinetic45^]

Travis, with the SS valve and .3 porting, what pressure gave the peak of the curve?
2600?
2700?
Something else?
(Hammer adj run in to 'no cock' then backed off 3/4 turn gives best for me with all bullet weights)

[ShakySarge]

Travis, as I suspect you guys have a CNC professional lever coming, please consider to incorporate this idea of a longer nub to the side which will cause slugs to seat slightly deeper, and also will retract the bolt a little more. Everyone could gain a little power from it. Actually, with that nub change, one can keep the factory linkage piece while still achieving deeper seating as well as retraction.

Been going over this in my head and while looking at the action of the bolt, linkage arm, and cocking lever. If the linkage pin hole was slightly more towards the muzzle it would both seat the bolt more forward and retract it a bit further. Extending it more towards the other side of the receiver would result in it not seating as far nor retracting more. If the factory ones that are bending are a sign, and I think they are, they show that the linkage pin hole tends to warp towards the butt of the receiver causing less forward seating and difficulty cocking. I really think that moving the steel lever's linkage pin hole forward towards the muzzle would get the desired result. Which, is why I think that the extended linkage arm you made was getting better results.

[ShakySarge]

If I have time between rebuilding and tuning a buddy's Mrod, I will experiment with both your theory and mine.

[Coyote]

Travis, as I suspect you guys have a CNC professional lever coming, please consider to incorporate this idea of a longer nub to the side which will cause slugs to seat slightly deeper, and also will retract the bolt a little more. Everyone could gain a little power from it. Actually, with that nub change, one can keep the factory linkage piece while still achieving deeper seating as well as retraction.

Been going over this in my head and while looking at the action of the bolt, linkage arm, and cocking lever. If the linkage pin hole was slightly more towards the muzzle it would both seat the bolt more forward and retract it a bit further. Extending it more towards the other side of the receiver would result in it not seating as far nor retracting more. If the factory ones that are bending are a sign, and I think they are, they show that the linkage pin hole tends to warp towards the butt of the receiver causing less forward seating and difficulty cocking. I really think that moving the steel lever's linkage pin hole forward towards the muzzle would get the desired result. Which, is why I think that the extended linkage arm you made was getting better results.

David "PCPHack" & Matthew & Travis,

If it helps; my experience (factory stock), the linkage pinhole stretched towards the butt. This lead to the bending of the aluminum factory lever due to trouble catching the "catch". This make sense? I hope this information helps in some way.

[Coyote]

What ever it takes to make it work the best! I got your backs Guys Im listening.

Thanks Travis!

[Kinetic45^]

Someone with a damaged handle needs to send Travis one so he can troubleshoot it and redesign.

[oldpro]

Someone with a damaged handle needs to send Travis one so he can troubleshoot it and redesign.

I have a whole gun here now.

[Kinetic45^]

Someone with a damaged handle needs to send Travis one so he can troubleshoot it and redesign.

I have a whole gun here now.

Good.
Then we can expect fixes and upgrades from the 'Skunk Works' development labs soon.  😊

I wonder if something like a different hammer with a PEEK striker and a SSG or TSS will be tested?

[PCPhack]

Meat in the cooler.

NSFW
https://www.gatewaytoairguns.org/GTA/index.php?topic=152316.new#new

[PCPhack]

Coolers are packed!

NSFW

https://www.gatewaytoairguns.org/GTA/index.php?topic=152336.0

[PCPhack]

And now I see the shipping notification from JSAR for my titanium tube. Awesome Christmas gift JSAR, thanks! 

[oldpro]

And now I see the shipping notification from JSAR for my titanium tube. Awesome Christmas gift JSAR, thanks! 

  Your welcome and merry Christmas.

[PCPhack]

The titanium tube should arrive tomorrow!

I am guessing that I settle on the 178 gr NSA slugs around 950 fps for 357 foot pounds. 357 from my 357.  That is, unless they can remain accurate at higher than 950 fps. The 130gr NSA (same design, just shorter) boattails started to lose accuracy for me when shot at 1000fps. It will be interesting to see how the 142gr and 178gr perform under high pressure.

I continue to find that my barrel gets 1 MOA of LESS accuracy after 2 or 3 dozen shots. If I clean the barrel, the groups tighten back up immediately.

[Coyote]

The titanium tube should arrive tomorrow!

I am guessing that I settle on the 178 gr NSA slugs around 950 fps for 357 foot pounds. 357 from my 357.  That is, unless they can remain accurate at higher than 950 fps. The 130gr NSA (same design, just shorter) boattails started to lose accuracy for me when shot at 1000fps. It will be interesting to see how the 142gr and 178gr perform under high pressure.

I continue to find that my barrel gets 1 MOA of LESS accuracy after 2 or 3 dozen shots. If I clean the barrel, the groups tighten back up immediately.

David, have you fire lapped your barrel? I had the same problem. I used the Wheeler kit with three different grits. Now it's not only more consistent but can shoot nearly three times as many times before cleaning is necessary.

[PCPhack]

I have read about and plan to one day try the Wheeler kit, but haven't yet. I suppose I have put it off for concern over ruining the barrel.

[Coyote]

I have read about and plan to one day try the Wheeler kit, but haven't yet. I suppose I have put it off for concern over ruining the barrel.

I felt the same until I actually used it. It made me think I was about to take a grinder to it. But it takes so little metal off, think of it as a polish. Like taking felt and jewellers rouge to a soft gold ring to make it shiny again. I'm sure if a person went crazy with it you could do damage but unlikely. Just follow the instructions. Works great!