Hollowpointer Modified .22 Ammo Range Report


Joshua M. Smith
October 22, 2009, 05:32 AM
A while back I bought a hollowpointer/accurizer tool. There were doubts expressed as to whether the modified bullets would perform.

I ran a 100 yard test. However, before we get to that test, let me walk you through the process of making the ammo.

Here are the components to the hollowpointer...

Fairly simple setup, but precise.

The first step is to put the round in the bottom block.

Assemble, and put on some sort of press - even a hammer will work.

Pull the handle...

... and a gaping hollowpoint (depending on depth settings) results.

But how do they perform?

They do shoot more accurately than unmodified ammo, but to the same point of aim. This is probably because they've been set to a standard size, and because the center of mass is further back. This is speculation however. I just know it works!

I set up four water jugs at 100 yards, and fired into them.

These are the results:

This is the first jug. It's pretty well shredded.

A line of all four jugs...

Here's a bullet I recovered from right beyond the fourth jug...

Two more stopped inside the fourth jug.

I believe the variation in penetration is due to the fact that I fired 10 rounds, and kept firing after the jugs were pretty well empty. I tried this test before with three jugs and failed to recover any. I therefore added a fourth jug and kept firing until empty to try to get a few decent samples.

This is a picture of the unmodified round, modified round, and the three bullets I was able to recover.

Keep in mind that this is CCI 40gn LRN I modified. Their website lists the velocities thus:

Muzzle 1235

50 yards 1092

75 yards 1040

100 yards 998

So, when the bullet impacted, it was acting as a heavy .22 short. Yet, it still expanded to over .36".

These are doing better than my old standby, Winchester Xpert, and are of course more consistent.

I'm impressed.

Josh <><

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ole farmerbuck
October 22, 2009, 06:36 AM
Where did you get the tool? Interesting.

October 22, 2009, 06:41 AM
I'm impressed too. Where is set up available from? Those look like nice little mushrooms.

October 22, 2009, 07:00 AM
There is a fellow over on Rimfire Central that makes them. I think they're about $75.00 a set. Look in the classified section, he has a WTS thread.

Paco Kelly over on Lever Guns also sells a similar tool.

Joshua M. Smith
October 22, 2009, 07:06 AM

Yep, this one was made by D Rock at RFC.

Paco's are made from brass and don't sound quite as durable. Could be wrong as I've never used his, but I'd much rather use tool steel.

Josh <><

Marlin 45 carbine
October 22, 2009, 07:50 AM
do the modified slugs group tighter as compared to un-modded?

Joshua M. Smith
October 22, 2009, 08:12 AM

Yes, they do. They're all resized to a constant .224" diameter.

Josh <><

Joshua M. Smith
October 22, 2009, 08:50 AM

100 yards, modified and weighed CCI...


10 shots.

Josh <><

October 22, 2009, 09:26 AM
I don't think I'd do the upsetting with a hammer. Where is the pressure going to go if you touch off a sensitive primer? For that matter I don't think I'd try it in a press either, but that's just me. My .22 does what I want it to without modification.

For comparison's sake, how did unmodified hollow points perform?

October 22, 2009, 09:49 AM
Is there not a chance the bullet will actually be seated deeper--possibly causing overpressure issues?

Uncle Mike
October 22, 2009, 10:37 AM
Is there not a chance the bullet will actually be seated deeper--possibly causing overpressure issues?

A 22LR bullet is a heeled bullet in that it has a step around the bullet that the case mouth rests on.

One would have to 'strip' this step, or heel off of the bullet in order for the bullet to be set any deeper into the case.

The .22 LR is both ubiquitous and unusual in that it is both a rimfire cartridge and it uses a "heeled" bullet. While most modern cartridges use a bore-diameter bullet that fits inside the case with the case being larger than bore size, heeled bullet cartridges use a two-diameter bullet with the shank smaller than bore diameter and fitting inside a case which matches bore size.


See what I mean...?

As for the hammer thing...I would not!

Marlin 45 carbine
October 22, 2009, 10:45 AM
how about posting specs on your rifle and the price of the kit and link to?

October 22, 2009, 11:08 AM
I'd like a link to the kit please!

October 22, 2009, 11:14 AM
Then there's something fishy about the original post Uncle Mike. Those fired bullets do not looked like "heeled" bullets to me. Or am I missing something???


Joshua M. Smith
October 22, 2009, 11:59 AM
As far as I know, all .22LR used heeled bullets, unless it's a shotshell.

how about posting specs on your rifle and the price of the kit and link to?


The rifle is a Savage Mk II BTVS in left hand configuration chambered for the .22LR. The 'scope is a Mueller APV 6.5 to 14 with AO and my first bipod ever.

The sizer/hollowpointer can be had from D Rock on Rimfirecentral.com . I'd give you a more specific link, but I cannot get the site to run correctly for me right now. It's lagging.

He does have it advertised in the "for sale" section.

Josh <><

October 22, 2009, 12:14 PM
The step on the .22 heel is not as pronounced as it appears in Mikes picture.
It's only the thickness of the case.
The base of a .22 is also slightly concave (similar to a Minie Ball) & when fired, the base of the bullet tends to obturate (upsets & expands to fill the bore) under pressure (approx. 22,000 psi).
See the 8th pic in the OP.

Tully M. Pick
October 22, 2009, 12:23 PM
D Rock's thread on it is at:


He has a link to it in his sig.

I also have one of these tools I use with a half-ton arbor press. Additional collars can be picked up at McMaster-Carr, part #6438K18. Works great so far. I should post some corroborating evidence if I get the time to go out to the range this weekend.

October 22, 2009, 12:27 PM
Mr Smith,

Are you shooting out a window?


Just curious,

October 22, 2009, 02:07 PM
I'd guess a sliding door into the back yard. If so, that's a nice setup...

October 22, 2009, 02:17 PM
I'd guess a sliding door into the back yard. If so, that's a nice setup...

That's how we used to harvest our spring and fall deer each year at my ex-mother-in-laws place in Bandera :)


October 22, 2009, 02:31 PM
looks like a sliding glass door to me....or that's a REAL low window LOL

October 22, 2009, 03:27 PM
That is some pretty amazing expansion for a .22lr... I am impressed.

Joshua M. Smith
October 22, 2009, 03:43 PM
Yes, I'm shooting out the door. It overlooks my 100 yard range, and prime squirrel habitat :D

Josh <><

October 22, 2009, 04:29 PM
Nice looking rifle.

October 22, 2009, 04:34 PM
I am not trying to be a smart-A, but couldn't you just buy hollowpoint bullets? What is the benefit over a OTC hollow-point that is 36 grain? Is it the extra 4 grain weight?

October 22, 2009, 07:02 PM
No, it's the assured expansion of the bullet along with the improved overall accuracy of having your bullets all the same OD. A lot of factory HP don't expand at all, and just pass through your intended victim. This might just leave you with a suffering, wounded critter running around the woods. And yes, the extra 4 grains is very helpful as far as energy on target goes.

Joshua M. Smith
October 22, 2009, 07:10 PM
What Woodsoup said. I've had too many squirrels run off and die in their dens. The accuracy lets me reach out and touch them further than I could otherwise.

Josh <><

October 22, 2009, 08:25 PM
Joshua M. Smith,

Nice rifle, but you must have the photograph inverted or something.................................................................................................the bolt is on the wrong side.

October 23, 2009, 12:25 AM
You're killing me with this. Now I want a rifle like that even more. I need to try some good ammo through my Marlin 60. How is accuray at 50yd comparing HP modded vs non modded bullets.

I want to try a .22 match here but I think the rule is no modded ammo.

Joshua M. Smith
October 23, 2009, 04:50 AM

The biggest thing I've noticed is that there are less fliers.

Take some dial calipers to any rimfire hunting ammunition, then run it through the resizer. I get .2245 on a regular basis, as it should be.

I don't see why you shouldn't be allowed to run modified ammo - all target ammo is, is ammo modified from the factory!

There is a round nose attachment that comes with this for resizing only, if you want to keep the basic shape.

Resize, weigh, measure the rims and sort - and you have what is, for all intents and purposes, match ammunition. Same powder charge and dimensions equals repeatability.

Josh <><

October 23, 2009, 10:06 AM
Not to derail here, but I am also interested in the rifle, especially since it is available in a left-hand configuration. How does it shoot in general? How is it bedded (if at all)? How does it fit the adult male frame? How much are mags? Etc.

Joshua M. Smith
October 23, 2009, 11:08 AM

It is one of the most accurate rifles I've ever owned.

It is not bedded, but you could do that easily enough. The barrel is free floated and heavy.


The trigger is set at a bit over 2 lbs.

Not much to say. It's just a good fitting, accurate rifle that will shoot better than most people can shoot it.

The 10 round mags are around $15; I do not know how much the five round mags are. It came with a single five round; I bought the 10 round mag for Appleseed shoots.

I am very pleased with this rifle.

Josh <><

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