Hammer spring

[Hatchdog]

Well, I guess I will have to amend my previous post. Finally got to shoot my Henry single shot 30-30. With the Grovtech metal hammer extension on, the rifle would only fire 50 % of the time. With the hammer extension off, it was good for about 9 out of 10.

My rifle is the newer type with one hammer spring. Out of the box, the trigger pull is 3 to 3 1/4 pounds by my trigger gauge.

I took the spring assembly apart, and added a .10" thick washer/shim of proper diameter in the tube that contains the hammer spring. It rests in the bottom of the tube that the stock-bolt threads into....then the spring sets on top of it, and then the plastic cup that the hammer strut connects to.

This brought my trigger pull up 8 oz/1/2 pound...now it is 3 3/4 lb, give or take. Hopefully, this will help with light primer strikes. Have not got the chance to shoot yet.

I may order some #54MY44 springs, rated 37-38 in lbs. They are pricey for 10 springs!

It seems the weight of the hammer extension greatly affects the primer strikes. Ranger Point Precision has an aluminum hammer spur that should be lighter than the Grov-tech hammer extension. I will also try one of these.

Any advice is welcome.

Sorry can’t give you any advice as you are already way beyond my capabilities but I’ll share that my Marlin 39-A has the same issue with light strikes with the hammer extension installed. Without its 100% ignition and with it’s probably around 50%. Thankfully there’’s enough space between the scope and the hammer that I can comfortably use it without the extension. Good luck on yours, sounds like you are getting the issue worked out.

[Hickok]

Hatchdog, thank you for the response and the encouragement!

I contacted HENRY and they want the rifle returned for warranty work. They will sent a mailing voucher for me to print out. I credit them with a fast and prompt reply. I sure hate to send it back, but it is probably the beat thing to do.

Ken "Hickok"

[Hickok]

I am waiting for Henry to send a return UPS shipping slip.

I did do some thinking about the trigger operation on these single shots. I notice when the hammer goes forward after pulling the trigger, it hits the inertial firing pin. Then the hammer rebounds to a safe position away from the firing pin.

Holding the trigger back, and then using thumb pressure to push the hammer forward to mimic firing, and then letting the hammer return to safe position one thing becomes clear, the rebound pressure is very high. The rifle is using the hammer spring to also rebound the hammer.

The top of the hammer spring guide/hammer strut is used to push the hammer forward. The bottom curved tip of the hammer strut contacts the lower part of the hammer after the moment of firing and causes the "rebound" Both actions use the hammer spring.

The rebound action has as much pressure as the hammer spring at full cock. We have two actions of the same poundage acting against each other. The dropping of the hammer is the longer of these actions....then as the hammer reaches the end of its drop, the bottom portion of the hammer strut and the bottom of the hammer connect and using the same spring rebound the hammer.

If the bottom of the hammer strut was slightly shortened, it would have less pressure from the hammer spring, thereby stopping misfires and light primer strikes. The rebound pressure needs to be lightened.

The hammer, the spring, and the hammer strut are fighting each other with equal pressure to fire the primer and to rebound the hammer to a safe position.

Just my thoughts, I hope everyone can follow my description.

[BigAl52]

Mine was an eary model that went back to Henry for the update. Ive not had one issue with mine. The trigger pull is good and the cocking of the hammer is also good. It goes bang everytime I pull the trigger when that hammer gets cocked.

[Hickok]

Henry received the rifle. Now I eagerly await the return!

[Hickok]

I received the Henry H015 back on friday 21. Great service and turnaround time from Henry.

They replaced the hammer spring and firing pin. I fired 5 primed cases and all were good with the Grovtec hammer extension on.. . but I did grind and modify the Grovtec extension to lighten it considerably. It being steel, I really believe it slowed downed the hammer fall/lock-time....for whatever the reason....just my thoughts.

I am going to order a Rangerpoint hammer extension, it being aluminum and lighter, I believe it will work better.

Henry customer service is excellent.

[Hickok]

Just an update, added the Ranger precision hammer extension, went out shooting and the Henry 30-30 single shot is working perfectly.

Again, thanks to Henry Customer service!