Today I have a mini post to share with you some light accuracy testing of the PSA 20 inch nitrided barrel assembly. Accuracy testing can be a chore, but this is more of a mini-assessment. The factory PSA upper is a flat top, nitrided, 20-inch rifle length system in 1/7 twist. The only change to the upper out of the box is a Magpul handguard. It is not free-floated. It is Gov’t profile. How accurate was it?
The two loads I brought with me are one factory, and one hand load. Each barrel is unique, so multiple loads will paint a better story, but my time at the range today was devoted to my DAEWOO with the PSA accuracy test a secondary consideration. Further testing will occur, as I want to do a full review of the PSA in the future. Let’s take a look at the loadings.
My first load is the ELD 52 grain match bullet over 24 grains of trickled Varget and a CCI #4 primer. This load is exceptional and has shown itself capable of producing .78 moa ten-round groups out of the right gun (cough Straight Jacket cough). I use ten-round groups as they are statistically significant, and tell a much more truthful story of shooter, rifle, and load than 5 or 3 round groups. Let’s see how the 52 ELD match did.
In the PSA, the load was lackluster. Each gun likes different loadings, so what can I say, can’t win them all. I will need to experiment with hand-loads to see what the nitrided girl likes:
The super-accurate load didn’t jive well with the PSA. At 2.07 MOA for a hand load, that’s not too hot. However, each barrel is different, therefore this one was a wash. The barrel didn’t like it.
Next up was the Federal Gold Medal Match. This bullet is a 77 grain over the counter bullet which has a reputation for accuracy. It is always in-stock local to me at Academy and makes a convenient testing round. Let’s see what it did out of the PSA:
Really big improvement with this load. A non-free-floated budget barrel pulling a 1.5 MOA group is fantastic. If this rifle was free-floated, we could expect to shave 1/4 to 1/2 a minute depending on load, etc. In today’s AR15 market, smaller companies are getting steamrolled by Palmetto… you have to wonder why. It’s because they put out a excellent budget product. It may be possible that with a free float rail and more handloading, the humble PSA could in-fact, get sub-MOA. For a standard barrel, it is shooting very well.
Adding More Perspective:
The PSA matched the accuracy of my Colt HBAR which has every advantage in its corner. It’s stiffer. It’s free-floated. It’s a big name brand… and the PSA just matched it punch for punch with FGMM. A basic. Cheap. Nitrided. Non-Free floated, budget barrel for the “poors.” The COLT did stomp over the PSA with the 52 ELD hand load coming in at 1.07 MOA. That’s the nature of such things though, I will have to work on hand loads for the PSA to see what she likes, but having a reliable budget rifle that shoots equivalent to higher-end gear… well, that no laughing matter.
Check out PSA’s 20 inch upper below:
With the barrel you have on this upper it is a 1:7 twist meant to stabilize 55gr and larger bullets. This might be part of the accuracy problem using a 52gr bullet for this upper. You should retry this using a 55gr cartridge instead. I use PSA 20 in CHF barrel one of my rifles and get about 1 to 1.5 groupings at 100 yrds non free floated. The barrel from PSA that I use is made by FN and is their PSA 20” 5.56mm 1:7 FN CHF Chrome Lined Phosphate A2 Profile Barrel. Great article.
True, but the 52 ELDs have had some great performance from 1/7 twists I have in my inventory.
A 52 grain eld has a BC of .247. A 55 grain fmj has BC of .245. The paltry difference of .002 makes no difference. A barrel twist appropriate for one, is just as appropriate for the other. An individual barrel may love or hate a particular bullet completely independent of twist rate.
YEAH,, I WONDERED ABOUT LIGHT BULLET IN QUICKIE TWIST… AND DIDN’T SPEC TWIST IN HBAR.. LOOK FORWARD TO A MORE EXTENSIVE TEST LATER.. TRY SOME SPUN BULLETS FROM FORT SCOTT AMMO OUT HERE IN KANSAS… YOU’LL LIKE ‘EM…….
TEST THE SAME 55gr. BULLET AT 200yds. IF GROUP SIGNIFICANTLY TIGHTENS; YOUR BULLET WAS NOT ALLOWED TO “GO TO SLEEP” AT 100yds., DUE TO BULLET SPIN. LONGER 77grain BULLET MORE STABILIZED, OBVIOUSLY; DUE TO SLOWER SPIN OF PARTICULAR BULLET (ONE OF THE REASONS WHY FAST TWISTS, EXIST). ALSO, IN THE LIGHTER/SHORTER BULLETS; TRY FLAT-BASED BULLETS WITH LONGER BEARING SURFACE. THIS COULD CHANGE BARREL ACCURACY.