CompareComparing...

Crosman Premier Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

Overview
Testers

Doug Wall
Stephen Archer

Caliber

.177

Model Number

LUM77

Test Date

April 24, 2018

Serial Numbers

N/a

Source of Supply

Supplied by Crosman Corporation.

Condition

New.

We Like

The price.
Available everywhere.
Very clean.

We Don't Like

Variable head sizes.
Pronounced seam.
Tins can be very hard to open.

HAM Rating
Comparison to Makers Claims
90%
Most Common Head Diameter
30%
Variation in Head Diameter
30%
Most Common Weight
70%
Variation in Weight
50%
Most Common Length
35%
Variation in Length
50%
Dirtiness
70%
Hard Air Magazine Test Conclusions

Crosman Premier Ultra Magnum pellets earn a HAM Silver Award because they combine low price with acceptable quality.

This is a popular pellet for long range hunting use - if you can manage to unscrew the tin, that is!

The variable head size means that there's a clear case for sorting Crosman Premier Ultra Magnum pellets before use. Even just rejecting the ones that are too tight or too loose when loaded into the barrel will improve downrange accuracy for most shooters.

52%
HAM Rating
You have rated this
Full Review

VALUE FOR MONEY

At a specified weight of 10.5 Grains, Crosman Premier Ultra Magnum pellets are significantly heavier than the majority of Crosman pellets in .177 caliber. Hence the “magnum” title.

As with the majority of Crosman pellets, they are priced very attractively. Online price is typically just 1.99 Cents each at $9.95 for a tin of 500 pellets. You can find even lower prices by selecting the “buy four tins get one free” offers from Pyramyd Air or Airgun Depot or by buying in-store at large big box retailers.

The graph below puts this pricing into perspective. The price of Crosman Premier Ultra Magnum pellets compares to the average (mean) price of .177 caliber lead pellets of 2.7 cents each. That puts these pellets into the “bargain” end of the market.

Crosman Premier Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

And if you want to buy US-made pellets, here they are! Crosman Premier Ultra Magnum pellets are manufactured at the company’s corporate headquarters at Bloomfield, NY.

BUY FROM PYRAMYD AIR
Crosman Premier Ultra Magnum .177 Cal, 10.5 Grains, Round Nose, 500ct
BUY FROM AIRGUN DEPOT
Crosman Copper Magmun Pellets .177 Cal 500 Ct

TEST DATA SUMMARY

Price per Pellet1.99 cents
Most Common Weight10.60 Grains
Pellets at That Common Weight18%
Variation in Pellet Weight (Smallest to Largest)2.96%
Most Common Head Diameter4.56 mm
Pellet at That Common Head Diameter16%
Variation in Head Diameter (Smallest to Largest)2.47%
Most Common Length6.68 mm
6.69 mm
6.76 mm
Pellets at That Common Length12%
Variation in Length (Smallest to Largest)2.25%

 

COMPARISON TO MAKERS CLAIMS

As usual, Crosman makes few claims about their pellets. The company claims that there are 500 pellets in a tin of Crosman Premier Ultra Magnum pellets. HAM found this to be exactly so. There were precisely 500 pellets in the tin we tested.

The manufacturer also claims that Crosman Premier Ultra Magnum have “more energy at long range”. This would be true compared to the regular 7.9 Grain Crosman .199 caliber pellets due to the heavier weight of the pellet, as heavier pellets have more energy.

But it’s particularly true due to the relatively high Ballistic Coefficient of 0.023 which these pellets have. Again this is higher than most of the regular 7.9 Grain Crosman pellets. Higher Ballistic Coefficients mean increased energy at long ranges.

However the pellets tested by HAM were rather heavier than the claimed 10.5 Grain weight, as we’ll see below.

 

CONSISTENCY

There were no damaged or malformed pellets in among the Crosman Premier Ultra Magnum pellets tested by HAM.

However, the head diameters found in the pellets tested by HAM were very varied. They ran all the way from 4.45 mm up to 4.56 mm, as you can see in the chart below.

This is a very large spread of 2.47% between largest and smallest. It’s far below the average consistency we normally find when testing head sizes.

It also means that some large diameter pellets will be hard to load in a break barrel air rifle – for example – while the smallest ones will tend to fall out.

Crosman Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

In fact, the largest head diameters were actually caused by a pronounced seam line between the two sides of the pellet. This is clearly seen in the photograph below.

Crosman Premier Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

This pronounced seam accounts for the 4.55 and 4.56 mm head diameters recorded in HAM testing, even though the diameter of the bulk of the pellet is less than this.

Consistency of weight was rather better in the Crosman Premier Ultra Magnum pellets pellets tested by HAM.

18% of the tested pellets had the same weight of 10.60 Grains, when weighed on HAM’s incredibly-precise laboratory grade balance. This is somewhat above average. The variability between the lightest (10.49 Grain) and heaviest (10.60 Grain) pellets tested was 2.95%, which is about average.

However, all except one of the pellets weighed more than the claimed 10.50 Grains. The average weight was 10.64 Grains, which is 1.1% higher than the manufacturer’s specification.

Crosman Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

Length consistency was also around average for the Crosman Premier Ultra Magnum pellets tested by HAM. However, as with the head diameters, we do not find the expected “bell curve” shape to the chart of length variability below. Yet it’s present in the weight consistency chart above!

The most common lengths found in HAM testing were 6.68 mm, 6.69 mm and 6.76 mm.

Crosman Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

 

DIRTINESS

Crosman Premier Ultra Magnum pellets scored well for dirtiness – or actually the lack of it!

Yes, there was a fair amount of the inevitable lead dust and debris present in the tin of Crosman Premier Ultra Magnum pellets tested by HAM. However, it should be remembered that this is from a total of 500 pellets.

In fact, the level of dirt per 100 pellets – the way we measure it at HAM – was actually quite low at just 0.552 Grains.

Crosman Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

 

DOWNRANGE PERFORMANCE

The relatively high Ballistic Coefficient of Crosman Premier Ultra Magnum pellets – 0.023 in HAM testing – gives them a relatively flat trajectory downrange. This is shown in the Chairgun chart below.

The yellow highlighted segment shows that the standard HAM test gun – a Beeman 1074 break barrel model – shoots effectively “flat” from 10 Yards to 38 Yards.

Crosman Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

 

HUNTING USE

That same high Ballistic Coefficient figure means that Crosman Premier Ultra Magnum pellets retain their energy well downrange – as claimed by the manufacturer.

The Kinetic Energy of Crosman Premier Ultra Magnum pellets pellets remains as high as 70% of the Muzzle Energy at 35 Yards and is still 60% at 51 yards. This makes Ultra Magnums good for long range hunting if your air rifle’s barrel likes them.

Crosman Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

The HAM soap penetration test shows the Crosman Premier Ultra Magnum pellet penetrating 60mm into the block. The wound channel entry hole was 7 mm diameter.

The “before and after” comparison photograph below shows that both head and skirt of the 4.51 mm (un-fired) diameter pellet were deeply marked by the rifling.

Crosman Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

Also noticeable is that the fired pellet had expanded from 4.51 mm to 4.57 mm diameter on impact, shrinking in length to 6.47 mm in length.

This performance indicates that Crosman Premier Ultra Magnum pellets are well suited to hunting at longer ranges on larger quarry.

 

BUYING AND OWNING

Crosman Premier Ultra Magnum pellets are widely available online, from big box sporting goods retailers and at your local Walmart. That makes them very easy to buy.

Crosman Premier Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

But they’re really, really difficult to open!

The HAM Team finds all Crosman 3-inch diameter pellet tins – including this one – to be extremely difficult to unscrew. Once you’ve got the tin open once, there’s no problem. But sometimes we’ve had to use strap wrenches to unscrew the lid! Sure, that’s an extreme case, but Crosman should set their machines to tighten the lids with a little less torque in manufacturing.

As with most Crosman pellets, these Ultra Magnums are manufactured from a rather hard lead alloy. This means that they’re unlikely to be damaged by rough-and-tumble handling, which is a good practical benefit for many shooters.

 

TEST DATA

Crosman Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

Crosman Ultra Magnum Pellets 10.5 Grain .177 Caliber Test Review

For background details on HAM’s Pellet Test Review methodology, check out this link.

Chairgun is a product of Hawke Sports Optics LLC and is used with permission. Check out http://www.hawkeoptics.com

BUY FROM PYRAMYD AIR
Crosman Premier Ultra Magnum .177 Cal, 10.5 Grains, Round Nose, 500ct
BUY FROM AIRGUN DEPOT
Crosman Copper Magmun Pellets .177 Cal 500 Ct

Understanding HAM Pellet Awards

HAM Pellet Awards come from the most rigorous, professional and comprehensive pellet testing by any independent publication. They are the result of much precise measurement and analysis using high precision measuring devices and highly-experienced testers.

Note that accuracy is a product of the complete “system” of airgun, scope, atmospheric conditions and shooter ability – not the pellet alone.

This means that no pellet test review can predict the accuracy of a particular pellet with YOUR individual air rifle. That’s why we do not measure accuracy in these pellet tests.

What HAM Pellet Awards do recognize is manufacturing consistency. Inconsistent pellets definitely will be inaccurate, consistent pellets are much more likely to be accurate.

HAM Awards also recognize value. There’s considerable variation in the price of airgun pellets. This means that an 8 cent pellet needs to score higher than a 2 cent pellet to achieve an award.

For full details of the HAM Pellet Award scoring methodology, please check out our Pellet Testing page.

For a full listing of HAM-tested Ballistic Coefficients, please see our Ballistic Coefficients page.

This entire article including scoring, data etc is Copyright Hard Air Magazine and may NOT in part or in whole be reproduced in any electronic or printed medium without prior permission from the publisher.