22 Conversion Accuracy

I have two 22 conversions. I Ransom Rested each, with five different ammos. Accuracy was not as I had hoped. Anyone else tested their conversions? (10 shots, 50 yds)

Details please

KevinB wrote:Details please

I'd rather not at this point- I don't want to start any wars, or influence any other shooters tests results.

I Ransomed two Nelson conversions. Mine and a friends, about a year ago when we first got them. Both shot SK pistol match Just under an inch on average (10 shots at 50yds) and CCI SV (paper box) just over an inch. Federal Auto Match shot around 2"-2.5"
 Shot several groups with each ammo type, was very pleased with those results, couldn't think of any reason to bother trying more expensive ammo.

Ransomed 2 Marvel unit1's with Rem SV(1995 era) and CCI SV.  Rem was at 3/4" and CCI at 1 1/4".  On the same level as my Hi Standards with LSP barrels.

Al

Why wont you post brand and type of ammo , you cant get a real answer any other way. there can be issues with all brands of things, maybe with the details someone can help you fix it.

Tested both my Marvel and Nelson with Wolf Match Extra (all I had at the time) both were under an inch. The Nelson was just slightly tighter.

- Dave

10 shot groups, barrels were cleaned and then I shot 50 rounds through each before testing.

you wouldn't ask "why do I get lousy gas mileage" without telling us you drive an RV.

james r chapman wrote:you wouldn't ask "why do I get lousy gas mileage" without telling us you drive an RV.

Or you could look at it this way.
The wife and I just moved from AZ to WI driving my 1988 Dodge Ramcharger.
I averaged 11.5 mpg, some would say that it is lousy, I thought it was pretty good for being totally loaded with ammunition and goods.

Your mileage may vary

Clarence

11.5mpg is great for that truck!

My advantage arms shoots pretty small groups.  My rest setup isn't great so I measure around an inch.  I can see the rounds going downrange and they just eat up the hole and make it bigger.  I have tested it with Eley Sport and CCI SV

DavidR wrote:Why wont you post brand and type of ammo , you cant get a real answer any other way. there can be issues with all brands of things, maybe with the details someone can help you fix it.

OK
Tested CCI SV, Aguila SV (blue&yellow box), Aguila match (blue box), Eley 10-X, and SK standard plus.
Best group with Marvel Precision  was 1-3/4" with SK+. Worst was 3-1/4" with 10-X.
Best group with Nelson conversion was 2-5/8" with CCI and Aguila SV. Worst was 3-1/2 with SK+.
Ransom Rest seems to be in good shape, mounted on a concrete pedestal. Grip inserts are good.
The previous week I got good results testing my Hardball Beretta. (2-5/8")

I just wanted to see if I was in the Ballpark.
Apparently not.

1. Check bottom lug where the rod screws into to see if it is cracked.
2. Make sure the mags are feeding well and not shaving lead when feeding.
3. Clean chamber and throat only with .243 brush. Pull through patch with kroil for barrel only.

Good luck.

In my experience I would say operator error.  I've always got less than 1" with most ammo. My best are in .5 to .6 range with premium match ammo for 10 shot groups.

The Ransom Rest, she can be a very fickle beast!

When testing several guns we have had sessions where no results were close to previous and we never could figure it out. Next time out and all is well again - go figure??? Obviously we were doing something different.

-Dave

It takes alot of practice to get a ransom to deliver sub inch groups.  I don't have time to invest in that kind of time so I shoot 25 shots into the same hole and measure the 1 hole.  I figure the outliers reflect a rest operation error, and the combination that delivers the smallest big hole is my best combination of ammo and barrel--unless that combination had an unusual number of flyers or something.

Well with both that's above what they say is the average so I would look at other reasons first, first thing I would do is change how you test. Herschel Anderson tests all the time for the Accu-lok gun company and he swears that anything over a 5 round test is testing your ability to keep all things right while changing mags and ammo in the gun. If it shoots 5 rounds  in a .5'' hole that is what it is capable of accuracy wise.

DavidR wrote:Well with both that's above what they say is the average so I would look at other reasons first, first thing I would do is change how you test. Herschel Anderson tests all the time for the Accu-lok gun company and he swears that anything over a 5 round test is testing your ability to keep all things right while changing mags and ammo in the gun. If it shoots 5 rounds  in a .5'' hole that is what it is capable of accuracy wise.

Yes, changing mags is an issue. Also, loading the first round is not the same as subsequent rounds.

I would say that DavidR is correct when using a Ransom rest.  I'm using that old Lee rest setup and that makes my testing a little different.

Rob Kovach wrote:I would say that DavidR is correct when using a Ransom rest.  I'm using that old Lee rest setup and that makes my testing a little different.

I also use the old Lee rest and agree that the big ol' hole test works best with it.

18 rounds and it's pretty clear where your at...

davekp wrote:I have two 22 conversions. I Ransom Rested each, with five different ammos. Accuracy was not as I had hoped. Anyone else tested their conversions? (10 shots, 50 yds)

My contribution to this thread-

1.  The Ransom Rest requires a fair amount of operator skill to get reliable results.

2.  More importantly for the .22LR cartridge is realizing that every barrel is unique and every batch of ammunition is unique.  How any particular batch of .22LR performs in a particular barrel is not indicative of how another batch will perform in that same barrel.  That's why Eley and a couple of other makers have Customer Ranges; so serious shooters can match a barrel to a particular batch of ammunition.

Replaced the top of a Kimber Rimfire Target with an Advantage Arms Target conversion with Ultradot 25mm sight and saw under an inch at 25 yards using old Eley Pistol Target.  Improvised rest.