I installed a Huber trigger and adjusted out the slack and shimmed slightly under the original sear spring and now have a sweet trigger pull. And the method I use for safely carrying my Mosin is to only load four rounds in the magazine, hold them down when moving the bolt forward to close the bolt on an empty chamber. When ready to shoot, open the bolt, chamber a round and shoot.
And I have read that the Mosin is more accurate like on a firing range with the bayonet attached as the bayonet nulls out some of the barrel
harmonics when firing but I neither fire on ranges not with the bayonet attached, nor have I modified my rifle in any manner than the trigger and sear shimming. It isn't pretty but I love this rifle !