Poor Accuracy with X-Treme RNFP 180gr over Blue Dot

[sparkyv]

Loaded X-Treme RNFP 180gr over 10.1gr to 11.3gr Blue Dot in 0.3gr increments.  SR1911 shoots accurately with Blue Dot using 180gr XTP, 180gr FMJ , and 200gr WFPGC hardcast.  Was literally all over the target with the plated X-Tremes today.  I've had great results with plated X-Tremes in 9mm and 40cal, but no-go so far in 10mm.  Does anybody have any similar experience with the X-Tremes in 10mm?

[The_Shadow]

Plating could be cutting on the rifling if the bore is tight., if bullets are too small they may not stabilize in the rifling...I not a big fan of plated types with Gold Dot being an exception because they are thicker jackets and the way they are made.

Check to see if the plating is building up on the rifling, cleaning may help...

[sparkyv]

I'll check on the cleaning, but barrel was clean going into yesterday's range session.  I may just have to load up those 180gr in my 40SW and verify if I see any issues.  X-Treme plated should be fine up to 1200fps so I'm puzzled, but I'm not certain about a tight bore.

[tommac919]

Just may be gun related...
I find the Xtreme heavy plated 180s to be really accurate with BD at 10.4gr ( G20 ) ((same bullet just the heavy plate version ))
Then again wonder if the heavy plated are slightly larger.... what do the 180's you have mic out to?

[sparkyv]

I think you figured it out tommac919.  I measured 5 bullets and got these readings: 0.399, 0.399. 0.398, 0.399, 0.398 inch. I measured five X-Treme 40cal 165gr RNFP bullets and got these results: 0.400, 0.400, 0.400, 0.400, 0.400. I got same measurements from 5 Hornady 180gr XTP bullets as well.  I sent X-Treme an email,  so we'll see how they respond.  Thanks for your help!

[Pumpkinheaver]

Sadly my Glock 20 does not like plated bullets. I've tried 3 different bullets from two makers and have had little to no luck with them. Luckily it shoots my home cast/powder coated bullets like they are laser guided.

[TonyRumore]

We sell thousands of 458 SOCOM barrels and just about every time there is an accuracy issue, the customer is firing plated bullets.
They would be great for a New Year's Eve celebratory shoot! 

Tony Rumore
Tromix

[sparkyv]

Well I loaded these 180 grainers in my 40S&W  and lo and behold, they shot pretty well.  So perhaps like Pumpkinheaver, my SR1911 doesn't like to eat plated bullets.  I'm going to try the heavy plate version next...we'll see.

[rognp]

Ive run into the other end of things. Using 180gr Reniers HP with 11.3 gr Bluedot my G20 with LW 6.02 shoots into around 2' at 30 yds. I see an occasional flier but I see those with other bullets too. Ive an eye fatigue problem that sometime has me seeing 2 sets of sights. That can really screwup a group. They shoot very well in my Sig P226 as well, but with a different powder.

[tommac919]

Ive run into the other end of things. Using 180gr Reniers HP with 11.3 gr Bluedo

11.3 and a 180 is running hotter than the norm... that may be why

[sparkyv]

It's taken several weeks and 6 emails, but the XTreme Bullets folks have finally responded to my issue.  I'm sure the Holidays slowed things up.  They've sent me a UPS return label and are sending me a fresh box of 500 projectiles. The customer service lady said that the ballistics experts want to examine my defective batch.  I'll post an update as I get more info.

[sparkyv]

Update: I received replacements and a small sampling mic'ed at 0.400".  I hope X-Treme Bullets will provide the ballistics technician's findings on the questionable batch I sent back.  Now to load these babies up and send them downrange!

[tommac919]

will be interesting to know....

BTW, the most accurate B Dot and the 180 is just about 10.4grs ( at least for me )

[High Desert Hunter]

I have had good luck thus far with the heavy plate X-treme bullets, best accuracy has been with Power Pistol and Longshot.

[The_Shadow]

High Desert Hunter, Welcome to the forum!  Thanks for your report...