1893 Mauser grouping poorly need some help

[randy langford]

Picked a 93 Mauser in 7x57 bore and crown are good it is one that has the hinged floorplate the stock is a nice commercial one but barrel is not free floated drilled and tapped. I put a scope on it group was the size of a dinner plate if you could call it a group. I was using Remington 140 grn corelocks . I am thinking about trying 175 grn bullets or free floating barrel all screws are tight. Well except maybe the ones in my head. Any thoughts or advice is appreciated.

[Liam]

My first inkling is to slug the barrel. It's easy enough, and will arm you with the confirmed knowledge of the bore diameter, etc. See the tutorial below. It is for a Mosin Nagant, but the approach is the same - just use a narrower slug of lead. HTH: http://7.62x54r.net/MosinID/MosinSlug.htm

[randy langford]

Thanks Liam I have slugged the bore on my Trapdoor didn't think to do the Mauser I will do that and see what the bore actually is.