64 Anschutz with IBI Barrel

[_Shorty]

Not sure what this has to do with the issue at hand.

You previously shot at 50 yards and thought it was ok. You later shot at 100 yards and thought it was not ok. But that's to be expected with a rifle tuned for 50 yards. It should not shoot well at 100 yards. And you seem to be forgetting this, as you are concerned about the results being worse at 100 yards, when that's precisely what should be happening.

I would talk to JGS or manson and see what the most popular reamer is. Forgot the name of the reamer most people use. I do know a benchrest reamer is going to be specced for a specific rim thickness, and most likely push the bullet into the lands, so it engraves the bullet.
I do know the eley chambers usually work good w lapua and SK. I think RWS rims are thicker if memory serves me right

Not all reamers have a belt, which is what stops you from going too deep. But belted or beltless, nothing stops you from going too shallow.

 

[Lakkenbak]

You previously shot at 50 yards and thought it was ok. You later shot at 100 yards and thought it was not ok. But that's to be expected with a rifle tuned for 50 yards. It should not shoot well at 100 yards. And you seem to be forgetting this, as you are concerned about the results being worse at 100 yards, when that's precisely what should be happening.


Not all reamers have a belt, which is what stops you from going too deep. But belted or beltless, nothing stops you from going too shallow.

wouldn't that have shown up with a go/ no go gauge?

 

[Leuchtkafer]

You previously shot at 50 yards and thought it was ok. You later shot at 100 yards and thought it was not ok. But that's to be expected with a rifle tuned for 50 yards. It should not shoot well at 100 yards. And you seem to be forgetting this, as you are concerned about the results being worse at 100 yards, when that's precisely what should be happening.


Not all reamers have a belt, which is what stops you from going too deep. But belted or beltless, nothing stops you from going too shallow.

Not quite, I threw the RWS results in the trash while the Lapua results seemed OK. 100 yard shooting showed me SK Semi-Auto would be a suitable ammo for silhouette shooting, I didn't test any of the "good" ammo as 100 yard accuracy shooting was not my intent. I shot 100 yards without a tuner, since this is my silhouette rifle and it's intended purpose, while bench accuracy is a side quest. All my "serious" accuracy testing with this rifle has been done at 50 yards.

wouldn't that have shown up with a go/ no go gauge?

That only pertains to headspace, which has nothing to do with how deep a rimfire chamber is reamed. Headspace is set by how long the shank of the barrel is that fits into the receiver. You can ream the chamber as deep or as shallow as you like without affecting headspace.

 

[_Shorty]

With the caveat that a belted reamer is meant to cut a small relief where the rim of the cartridge will seat. However deep you cut the relief, that depth needs to be accounted for by a similar headspace reduction in the fitting of the barrel. And when used in this fashion, such a belted reamer then dictates the depth of the overall chamber. I've got two Eley EPS reamers here. One with a belt and one without. The one with the belt is limited to a 0.620" overall chamber depth, as that is how far back the belt is situated. Either reamer could be used to cut shallower than 0.620", but only the beltless version could go deeper than that.

The top one is the belted one. You can clearly see where it steps up to a larger cutting diameter at one point. They both have the same chamber dimensions other than that.

 

[guntech]

Cut an inch off the muzzle and recrown... it's worth a try, not much to do... if that fails to get results I would cut the chamber off and redo that end before giving up.

Personally I don't like the reamer that does not cut a rim...

 

[horseman2]

guntech rebarreled my 40XB with a Lilja barrel using a Eley Match reamer.
The Harrel tuner was set for 50 yrds and I have not changed the setting for 100 metres.
The secret is to find the best ammunition without the tuner then work your tuner to fine tuning.
Once the tuner was in place I started at zero, then worked up two revolutions per test.
By the time I was at 10 revolutions I went back to find the node between zero and two revolutions.
The setting was found to be at 17 and it has not been changed.
The ammunition was Remington Eley Match tested at 100 yards and that lot saw me order over 10,000 rounds.
When that runs out the entire process starts over.
The definition of insanity . . . Trying the same thing over and over expecting different results.