Full barrel bedding or action only?

[EddieE]

What do you guys think will result in best groups? I read on another site that with the CZ 455, it like full barrel bedding. Makes it much more accurate and less hold sensitive.

What are your thoughts?

[Ronnie]

455's are full floated from factory. I have bedded (5) actions only then go and shoot to see results.They should be pillared as well.Do this and shoot it before any other mods.Don't jump in at the beginning,shoot a few brands of ammo to see what shoots best in your gun then burn up a couple of bricks to get the feel of your gun.Shoot at 50 yds with sub sonic ammo it will give you the best results.Shoot 5  5  shot groups and see if the gun and yourself are capable of that demand(groups under 1/2" are easier said than done). Don't do anything with the barrel until you see what it shoots like.Crown,head space,chamber and much more are all taken into consideration for evaluation.Just go and shoot it before you do anything.Some 455's have come with a tomato stake for a barrel not many but some.Again shoot it with no mods and get a baseline to work on.Just the torque on the action and barrel set screws can give a large change.There is a very popular rimfire site that has an endless amount of info.If you haven't done a pillar and bedding job before you will need to read up on it before the plunge.It isn't that difficult but not a walk in the park if you don't do some research to avoid pitfalls.Your cleaning program can also help you out.Hope this gets you in the zone.

R

[EddieE]

455's are full floated from factory. I have bedded (5) actions only then go and shoot to see results.They should be pillared as well.Do this and shoot it before any other mods.Don't jump in at the beginning,shoot a few brands of ammo to see what shoots best in your gun then burn up a couple of bricks to get the feel of your gun.Shoot at 50 yds with sub sonic ammo it will give you the best results.Shoot 5  5  shot groups and see if the gun and yourself are capable of that demand(groups under 1/2" are easier said than done). Don't do anything with the barrel until you see what it shoots like.Crown,head space,chamber and much more are all taken into consideration for evaluation.Just go and shoot it before you do anything.Some 455's have come with a tomato stake for a barrel not many but some.Again shoot it with no mods and get a baseline to work on.Just the torque on the action and barrel set screws can give a large change.There is a very popular rimfire site that has an endless amount of info.If you haven't done a pillar and bedding job before you will need to read up on it before the plunge.It isn't that difficult but not a walk in the park if you don't do some research to avoid pitfalls.Your cleaning program can also help you out.Hope this gets you in the zone.

R

Thanks Ronnie. I have shot about 150 rounds through it. Great accuracy at 25 yards, things fell apart at 50 and 100. No telling if it is me or the gun. My money is on me. I have not shot for extreme accuracy since I stopped shooting my airgun many years ago. I'm sure I'm very rusty. I used to get dime size groups with that at 27 yards. I'm not about to drop more $$ on a shooting vise though to find out if it is me or the gun.  I only have one ammo type on hand. I have 8 others on order. I will pillar it and action bed it. Do you think do the pillars and test shoot or do both at ones? I will have a gunsmith do this as I don't want to screw it up. If it was a beat up old truck 10/22, I would do the bedding myself. But I want this one done right. I have high hopes for this gun.

[painter]

In addition to what Ronnie said...

ammo that shoots great at 25 yards may, or may not, perform the same at 50 and 100. Until you start spending serious cash on match ammo you won't see precision. Even match ammo will have mean velocity variance large enough to open a group up at 100.

If you're going to pillar your action, then bed it at the same time. You can add barrel shims later to test if that makes an improvemment, and then decide if you want to full length bed it.

I want to caution you again about the rimfire rabbit hole...especially with a ~$450 sporter.

[EddieE]

In addition to what Ronnie said...

ammo that shoots great at 25 yards may, or may not, perform the same at 50 and 100. Until you start spending serious cash on match ammo you won't see precision. Even match ammo will have mean velocity variance large enough to open a group up at 100.

If you're going to pillar your action, then bed it at the same time. You can add barrel shims later to test if that makes an improvemment, and then decide if you want to full length bed it.

I want to caution you again about the rimfire rabbit hole...especially with a ~$450 sporter.

I know about the rabbit hole...half way in my friend. What would be a good barrel shim to use? I bought the bleep thing to shoot cheap. It isn't looking like I will achieve that goal.

[Ronnie]

As i said stop chasing your tail. Clean it up with a few patches,get more lead down the barrel and see what it does.You need a brick of anything shot through it.If you don't have a sturdy platform to shoot from there will be no end to the cash you burn through without having repeat-ability there isn't much sense going any further.Go out shoot it until you are going to be able to have repeat-ability.Now make your first change and review results.Sure you may be rusty but conditioning yourself is a large portion of the skill set you will enjoy doing.I would only shoot sub sonic in the learning sessions. SK magazine,SK standard plus or equivalents are a fair place to begin and then peruse the pillar and bedding.After that the hunt begins remember it is only money"LOL"

R

[EddieE]

As i said stop chasing your tail. Clean it up with a few patches,get more lead down the barrel and see what it does.You need a brick of anything shot through it.If you don't have a sturdy platform to shoot from there will be no end to the cash you burn through without having repeat-ability there isn't much sense going any further.Go out shoot it until you are going to be able to have repeat-ability.Now make your first change and review results.Sure you may be rusty but conditioning yourself is a large portion of the skill set you will enjoy doing.I would only shoot sub sonic in the learning sessions. SK magazine,SK standard plus or equivalents are a fair place to begin and then peruse the pillar and bedding.After that the hunt begins remember it is only money"LOL"

R

Will do. I checked the stock screws and they are at 25 in lbs. I can't check the barrel screws as I don't have the right bit. I have two sets and neither has the 3 mm hex that I can use with my fat wrench. Need to pick one up but don't want to get a cheap one that may chew up the screws...need to look around.