Silver rapids .223 powder coated bullets.

Then I have me self a 22 Hornet with a big case ::)

Some old wisdom said that cast bullets (with GC) should be kept below 1700fps. I would rate powder coating about as good, so 1700 should be fine. That's what I load my 375 cast GC bullet to.

With S335 you should be able to go to a pretty low load. Use a filler if you need to go below 15 gn (+/- 60% case fill). This applies to S335 only, not any other powder.

we now on 84 test shots, silencer on - off, COL long - short. 2200 -2540 fps. Annealed cases, once fired cases.

I will do last test shooting into a pool to collect bullets.

1 - 9 twist might be too much for this coating.

Only one shot on target?

You can see three more shots off the paper. Two to the right and the last one just off bottom right. All marked with red arrows.

Only one shot on target?

Did you shoot a group with at least 3 shots?

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4 shots - one kept for velocity check if the load worked.

Did you shoot a group with at least 3 shots?

Not even the wrong load does this.

Shot without silencer.
1 hole by Cody Allen, on Flickr

Something else to consider:
These bullets are softer than any metal-jacketed type. I should be a good idea to remove any jacket (copper) fouling from the bore before shooting these, as a little copper fouling could really mess up the softer bullets.

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I am on the look out for a place with a swimming pool I can shoot these into and recover them, my usual spot is 180 km out of town and dunno when I will be in area.
Perhaps I will take a 100 lt drum to one of the closer farms. I want to get some bullets back that have not hit sand and rock etc just clean deformation from water, check the engraving, coating etc
.....................................its the silencer - the bases - I said so in my first post and did not heed self, you are correct I am sure of this.

Something else to consider:
These bullets are softer than any metal-jacketed type. I should be a good idea to remove any jacket (copper) fouling from the bore before shooting these, as a little copper fouling could really mess up the softer bullets.

While you are at it, test the other loads (50gr, 55gr etc) without the silencer.

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Rifle is brilliant with anything else - silencer on or off, usually shoot a bit of other stuff after every test session.

From my own, very limited, experience:

I cast some bullets from a modified Lee .225" 55gn mould using 2 different alloys.
The alloys were straight Linotype and 50/50 Linotype and wheel weights. Both are pretty hard.
The mould was modified by reaming out the gas check rebate and the lube groove. This was done in an attempt to increase the bearing surface.
PC was applied by dry shake-and-bake method to get the best finish.
Bullets were pushed through a .224" Lee sizer die.

I shot them from my trusty Zastava M85 rifle with 1:12" twist. Powder was S335.

At around 2500fps I had trouble keeping them on paper at 30m.
Reduced speed to around 2000 and 1500 fps with same results. Speeds are estimated, I did not want to risk my chrony before I know they are coming out in the right direction.
At 10gn of S335 the groups tightened significantly (+/- 2" at 30m), but I would not want to make a 22LR out of my 223, so this load was not deemed worth measuring the MV of.

My conclusion from the tests is that my PC is way too thin, or the bullets are too small, or both, and they are stripping, or misbehaving in another way, in the rifling.

I will first try to make the PC thicker and size the bullets to .225".

Just a note on suppressor use with this type of bullet: If the bases of the bullets are not perfectly formed, they can easily yaw a little when exiting the muzzle. This yawing could be enough to let the bullets touch the baffles in the suppressor, causing wild flyers on (or off) target.

Your post is valued, I think we thinking same line of thought, see OP regarding bases of bullets and then latest posts regarding silencer.
Thank you for input.

While you are at it, test the other loads (50gr, 55gr etc) without the silencer.

From my own, very limited, experience:

I cast some bullets from a modified Lee .225" 55gn mould using 2 different alloys.
The alloys were straight Linotype and 50/50 Linotype and wheel weights. Both are pretty hard.
The mould was modified by reaming out the gas check rebate and the lube groove. This was done in an attempt to increase the bearing surface.
PC was applied by dry shake-and-bake method to get the best finish.
Bullets were pushed through a .224" Lee sizer die.

I shot them from my trusty Zastava M85 rifle with 1:12" twist. Powder was S335.

At around 2500fps I had trouble keeping them on paper at 30m.
Reduced speed to around 2000 and 1500 fps with same results. Speeds are estimated, I did not want to risk my chrony before I know they are coming out in the right direction.
At 10gn of S335 the groups tightened significantly (+/- 2" at 30m), but I would not want to make a 22LR out of my 223, so this load was not deemed worth measuring the MV of.

My conclusion from the tests is that my PC is way too thin, or the bullets are too small, or both, and they are stripping, or misbehaving in another way, in the rifling.

I will first try to make the PC thicker and size the bullets to .225".

Just a note on suppressor use with this type of bullet: If the bases of the bullets are not perfectly formed, they can easily yaw a little when exiting the muzzle. This yawing could be enough to let the bullets touch the baffles in the suppressor, causing wild flyers on (or off) target.

loving this Treeman, your frustration is of great amusement to me ;D
What was it you said to me (6 beers later) - "I can make anything accurate, just need some time"
Gonna send Sliver Rapids a box a chocolates.
By the way, you looked a bit pale while telling the story ;D ;D ;D ;D ;D

Rifle at this moment shoots between 10 mm and 20 mm group with 5 other reloads from Mono to V Max. The problem is the bullet rifle combo, I forgot to shoot without a silencer, as you suggested - I really believe that for some reason these bullets are touching the baffles - nothing else I know of can cause such extreme flyers.
Problem is, I am so used to shooting with a silencer, it just never occured to me to remove it, even when I knew to test it. I will give this one more try, I will also leave silencer with note on it " do not use next testing"

Have you tried the same cartridges in another rifle? It would indicate whether the rifle is to blame.

not with me now, but yes a few time 2400 - 2600 was in the test range. I think the last batch was even slower, but had no chroni as was on farm not range

Did you measure speed?

I give up, not even going to try any more. I can not get these bullets to group, I have shot about 80 shots of 4 shot groups, nothing works or even starts leaning towards a receipt.
I forgot to try shoot with out a silencer - that is all it can be now, there is nothing - fokkallee, else it can be.
Must must be touching the silencer - what else.
20221230_190904 by Cody Allen, on Flickr

The numbers are the string group, so the 2 and other 2 - 3 and 3 were all shot as four shots group 3 and so forth.
I had to enlarge usable page to find some holes, hence the new unshot background sheet.
This is at 50 m

20221230_190949 by Cody Allen, on Flickr

What the *&^%&^%^&% to do, I want them to work.

Tree, when you going to do battle with those red bullets again? I want to try get our .303 ready and right. Call me.

I collect last years telephone books for this purpose. I now go to printing shops as well and get the side off cuts.
This works for penetration and deformation/expansion. I used the hammer to see if the bullet shatters, crumbles or breaks up.

Smashing the bullets with a hammer is a good way to test how well the coating bonds. Doubt if it's meaningful as a test of what the bullet would do on impact though. I once made a few newspaper targets similar to what Tripodmvr describes. Stuffed rolled newspapers into HTH buckets till I couldn't fit any more in and then topped off with water. Shot them with my Svarog 12G slugs to test their efficacy.

Shoot them into water soaked magazines.

I will be loading these to about 2500 fps for another test, I also annealed all the cases - a bit over annealed perhaps.

Would hitting a bullet with a hammer simulate impact ? I am told these bullets are very hard, I wish to test this.

My best .270 cast and powdercoated load is every bit as accurate as the best I achieved with jacketed bullets just at approx 70% of the velocity.

I will try it, but I suspect their velocity claims are ambitious.
I am also very dubious of the bullet bases - the base is very critical in regard to accuracy.

I don't know what the composition of the coating is but if it's properties are anything at all like powdercoat I'd tend to agree.

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I had a long chat with the owner of Silver Rapids today - Gavin, what a nice man, honest, honest enough to say somethings that were not promoting his product, just true - the guy seems to have a thing about straight talk.
The bullets are at the moment more for the SLR guys, 2 MOA at a 100 m stuff.
The goal is to do a one MOA bullet, but they are not there yet or are they? After much chatting Gavin told me of various rifles that produced touching hole results and the reasons they found behind the rifles that were inaccurate.
It seems that hard cases altered the bullet diameters by quiet a bit, particularly previously fired PMP cases which were swageing the lead bullet to below usable diameter. Interesting ?
He also spoke of a new propriety type of coating originating on the shuttle and F1 cars that has a fiber inter poly makeup which they are hoping will get the bullets into the 3000 fps ability zone.

So for now I will work with the info and checks he gave me to see if I can get to the 1 MOA at 50 m and then work from there.
They are also looking at running a second strike, swageing stage to perhaps get the bullet more capable of copper coated accuracy.

I will try it, but I suspect their velocity claims are ambitious.
I am also very dubious of the bullet bases - the base is very critical in regard to accuracy.

I don't know what the composition of the coating is but if it's properties are anything at all like powdercoat I'd tend to agree.

There is no harm in trying and seeing if there is an improvement. A rifle that normally shoots well should not scatter them like a shotgun.

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Oh ! totally agree, I just thought that you had some info on lead bullets and silencers or something. I will try it, but I suspect their velocity claims are ambitious.
I am also very dubious of the bullet bases - the base is very critical in regard to accuracy.