Ronin

You were one of the very first chassis rifles Oh how things have changed now

Sadly it was Good times

I’m sure with a quality barrel - if fitted by a competent rifle smith you should be able to develop a load that returns single hole accuracy at calibre diameter or just slightly larger without resorting to a tuner You don’t say if the brass you’ve loaded is brand new or left overs from the old barrel If the new barrel was chambered and headspace’s to the same dimensions as the old barrel then it should fit The issue will be the bore diameter of the Bartlein will likely be different to the Sassen it replaced and if tighter land diameter will manifest in higher pressure something to bear in mind from the onset A tuner may help with a generic load but doesn’t replace good practice load development 👍🏻

Thanks for the pics and explanation re the contamination the pics of the chassis show some witness marks (tang area and around forward action screw hole There are also witness marks on the action in similar areas There doesn’t need to be any movement under recoil to create these marks It highlights my point that even inlets thy replicate certain actions are not 100% contact and will cause stress in an action when torqued down due to elasticity of the materials and the high forces generated (even at 50 inch pounds) that’s enough to bend the action or pull it out of shape This will have an adverse reaction to accuracy How much is dependant on where and how much movement there is in the action and it’s effect on contact surfaces of bolt lug : abutments : barrel tenon An example - last week I bedded a HS Prevision stock (alloy v block design in let) to a rifle I built two years ago, the rifle was put in a used pre bedded stock (bedded to another action) bought post build by the client - it shot sub half Moa in that stock I had some pictures back yesterday of groups shot with the rifle in the stock I bedded Single hole, consistently repeatable groups That demonstrates the importance of mating the action to the inlet with bedding This isn’t the first time such improvements have been highlighted The rifle in question is for deer work - I’d recommend anyone with a comp gun give thought to this simple but effective improvement to their chassis based “system”

@Catch-22 Could you post a pic of the MPA action inlet (current) - intrigued to see if there are any witness marks showing on inlet or action base of the Inpact ,,,after several years of use in the chassis

No the Rem clones and Rem 700 are never a perfect all contact fit in any chassis including AiCS and any chassis that is “inlet for specific action” One usually finds there is waterline contact along the length of the action on either side Appropriate skim bedding will address this though and provide stress free contact when action screws torqued

7/300 WSM if you want to go 7mm This cartridge has provenance in F Class to World Championship level and will get to a mile easily Though as Greg points out - spotting misses will be “problematic”

A stunner One of the best F Class stocks, period Good luck with sale 👍🏻

PRC is magnum bolt face The ATX is only available in .473” bolt face You would have to use an A X MC but the short action cartridge may have issues feeding in this magazine

Walters Rifleman produce a specific magazine to feed this and other short stubby cases

I did say it was relatively easy if you followed the drawings well done 👍🏻

Barrel is easily changed with clamp and action wrench

I get why buy one - new shiny kit Also own LabRadar - Whixh works for me and is pretty portable But then so is my Magnetospeed and Oehler 35p (though the latter a faf to set up in comparison) 👍🏻

So the UK warrantied units are selling or likely to sell at £530 yet people are buying from the states at 500 and incurring import duties and vat to the tune of over 100 Non UK importer supplied units are not covered by warranty in this country and no doubt they will have serial number so easily verified Am I missing something as why it is sensible or even an intelligent option to buy outside the uk ?

What accuracy was it returning