doublegunshop.com - home Forums General Discussion Classic & Custom Single Barreled Sporting Rifles @ doublegunshop.com custom trigger for a Mauser

I have never used a Blackburn trigger but I see they are used frequently by custom builders so should be a good one.

Just a suggestion but having the firing pin drop when bolt is closed is usually the result of insufficient sear engagement or too light a trigger pull. I've also found that with triggers that have the levers enclosed ie. Timney, Canjar , Remington & such that if oil & or cleaning solvent is allowed to get into the trigger housing it can congeal over time & cause the problem you are describing & from picture of the Blackburn it looks similar in design.

I always use a rod guide when cleaning to prevent this & I don't put any oil into the trigger housing.

Try spraying with an aerosol solvent like Gun Scrubber if you have not done so & check sear engagement & pull weight before giving up on it.

I have used Timney triggers on all of my Mauser sporters with either a M70 or Buehler type safety & never had any issues but I don't know how a Timney will work out for you with trigger placement within the guard bow.

On a DWM 1909 action with original hinged floorplate & trigger guard assy. & a Timney (not sure of the model but was called Sportsman or Sportsman LW I think w/blued steel trigger & aluminum trigger housing)the distance from the center of the rear guard screw to the center of the rear edge of trigger bow is approximately 0.6".

I'm not positive what Mauser triggers Timney currently makes but it shouldn't be difficult to find old stock & at one time Timney made Trigger assemblies with 2 different lengths of trigger bows for a neater fit depending on the trigger guard & floorplate used.

That said, it's tough to beat the Winchester M70 exposed 2 lever trigger system or the original Mauser trigger system for absolute reliability under all conditions & it's what I would want on a rifle I intended to use on dangerous game.