i don't have the mod 340,357 but I have had the mod 342ti for a few months and have carried it daily since, I have only put about 500 rds through it,but it has been 100% reliable,is accurate and I enjoy shooting it as long as standard pressure loads are used under 130g or so,I have put roughly 100 rds of +p's through it but i feal all the extra blast and what is lost in controlability +p ammo is not worth it, I feal very well armed with 5 fed. 110g pd's and a speed strip reload. It is by far the finest gun for pocket carry i have owned in 10+ years of carring various concealed firearms. I did change the origional grips to houges new bantum grip which is also highly reccomended with the bantum grip the empty weight is reduced to just under 11oz.