What to expect from a Criterion barrel

[IOWA fARMER]

I just measured 2 new CMP barrels. Both 1.5 TE and .8 ME

[M2HB]

The Criterion barrel on my new CMP SA Special that was made in 2007 has a MW of 1.5.

[RogerFoxDog]

I talked to Steve at Criterion today and he basically said that Criterion strives to stay within and keep to the low side (.3005) of the original blue print for the Garand barrels. I believe he said that the original specs called for a bore diameter of .3005" to a max of .3015". He did allude to the idea that these are service grade barrels meant to get the Garand back into service grade condition, But he also went on to say that Criterion wanted to put out the very best product, and most uniform bore, in this service grade category. He basically reaffirmed what Gus Fisher and others had seen on occasion with NOS SA barrels with the same readings. He was very accommodating and asked if I would like to send the barrel back for inspection. I decided that I would just get out there to the range and shoot it when final assembly is completed. Thanks to all for your input and observations.

[byronroland]

I am getting a new Criterion on an M1 first of October. I am interested in seeing what it reads. I know a little about gun drilling and it is difficult. I know little about modern rifling and the accuracy they can hold. I do know I have a M1D that reads a MW of 3 close to 4 and it shoots great! I have another that has a Citadel barrel and reads a good 2.5 and it shoots no better. Obviously a 3 close to 4 is not good, I am surprised at how well it does shoot and expect it to go at any moment.

I will report on my new one. I would love to see a study of MW readings and 100 yard accuracy for series of rifles over time. Of course, who would do this and how much would it cost?

The long term barrel life test being done now by GCA is an interesting study.