Basic Black - My new F Class trainer

Just re-read this thread while hunting for accuracy tips/ideas with rimfire and didn't notice any mention of sorting rimfire ammo by rim thickness. Have any of us out there got any info on this? I read about using a fired and trimmed .223 case and a set of calipers as a good /cheap way to measure rim thickness. Wondering about rim thickness VS overall weight and what is more noticeable?
 
The jury is still out on rim-thickness sorting. It may have some benefit with lower grades of ammo where the quality control is not to the same level as more expensive ammo and brands. Benchrest Central - rimfire section has threads on some findings. Typically , the 50yd/m and BR specialists don't bother with it.
The relevant thing is if you believe in it keep doing it or start the practice.
Speed deviation, measured over a chronograph, is more relevant and generally is more evident in lesser grades of ammo. The vertical dispersion caused can be detected as close as 50-100m.
 
Almost all bolt action rifles squish the rims during the final stages of the bolt closing so rim thickness isn't really that big a deal.

Primer content, powder consistency, etc, etc, etc, makes way more difference then a thou or so in the rim thickness.

Test for yourself.

I let the holes in paper tell the tale and with a rimfire, when it likes or dislikes something, there is no denying the results.

Jerry
 
To add to Jerry's comments , even in weighing the cartridges it's not possible to determine which of the four cartridge components is contributing to the results variation. And none of them ,obviously, are possible to change.

Find an ammunition your rifle likes , try to get a good supply of the batch and shoot it !
 
I apologize if this is off topic. Clearly, mystic isn't shy about buying match quality ammo (and I don't blame him after seeing the results he's getting) but I have a question about 'accurizing' cheaper bulk ammo.

I saw a device on the interwebs called an "acu'rzr". Consists of a piece of brass with holes machined out to .222, .223, .224 and .225. There are 3 rods to form the nose (Flat, hollowpoint, hollow with centre post). Intention is making cheaper rounds more consistent in shape. Does anyone here have experience with such a product? Being new and less knowledgeable about such things, the concept as described seems sound but I'd love to hear from the more experienced members of the board.

Thanks!
 
Any pursuit of accuracy, rimfire or centrefire, requires first to decide what level of accuracy is desired within the range of resources one has at their disposal. Most significant resource is the dollars you allocate to the pursuit.
Any device or procedure may add to uniformity which may lead to consistency,
but when the dust settles 'a silk purse cannot be made from a sow's ear ' !

There is no free lunch and no easy way of finding consistency with rimfire ammunition. Start with good components(rifle and ammo) and you increase the chance of finding a recipe that works.
 
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