Here is an excerpt from great article ...
Lovin' that Lock-N-Load
It was a great dissatisfaction with the Dillon powder measure that led the author to acquire his Hornady Lock-N-Load AP (hereafter LnL), so it's with the LnL's superior powder measure that we will begin. The LnL uses a conventional rotary drum type powder measure with a mechanical linkage that looks complicated, but actually has fewer moving parts than Dillon's. On a purely subjective note, the Hornady's powder measure makes operating the LnL feel far smoother than the often jerky clunking of the Dillon measure. As has been previously discussed, the Dillon powder measure has no means by which to record a powder setting. The LnL powder measure gives you two options. First, unlike the Dillon powder bars which are difficult to remove, the LnL measure's metering insert snaps in and out of the measure. In this way, you can buy one metering insert for each load you shoot and easily snap them in and out of the powder measure. "How is this different from buying multiple Dillon powder measures?" you ask. The LnL metering inserts cost less than $10, compared to Dillon's $55 measure. An even better alternative is Hornady's micrometer metering inserts (one is used for pistol sized charges, another for rifle) at $25 each. This inserts easily snap in and out of the measure and feature a micrometer adjustment that allows the reloader to easily record and and reset loads. Another advantage of the snap-in LnL powder measure system is that the measure can be drained by snapping out the metering insert and snapping in a drain adapter. Unlike draining the Dillon measure, which involves inverting it and then shaking or manually cycling it, draining the Hornady measure is completely painless. The Hornady measure is also much easier to move around. If you recall, moving the Dillon measure from one toolhead to another can be very tedious. To move the Hornady measure, one simply unhooks a spring, loosens an allen-head screw about 1/4 turn, lifts the measure off the old powder die and onto the new powder die, then rehooks the spring and tightens the screw. The removeable inserts also mean you can use one powder measure to throw loads for everything from .32 S&W to big magnum rifles. Finally, Hornady makes a powder measure with an aluminum hopper and brass internals (suitable for use with blackpowder) that can be used on the LnL. The 550 has no provision for loading blackpowder cartridges.
Unlike Dillon presses, which have a removeable toolhead, the LnL's top plate is solid. Hornady's excellent Lock-N-Load system consists of lugged bushings, into which dies are screwed and adjusted. Dies can then be installed in the press with by rotating them 1/6 of a turn. This gives you all the quick-changing convenience of the Dillon toolhead with a more rigid press. A set of Hornady bushings costs about the same as a Dillon toolhead. In addition to a new toolhead, loading a new caliber on the 550 requires a "caliber conversion kit" consisting of a powder/expander funnel, locator buttons, and a shellplate. A conversion kit for the LnL consists of only a shellplate partly since the LnL bells the case mouth and throws the powder charge in different steps. Separating these steps is the "traditional" method; throwing a powder charge through an expander funnel is an idea that was patented by Lee Precision and for which Dillon pays royalties. It is for this reason that Dillon's proprietary die sets do not include a separate expander die, while all brands others do. Additionally, the 550 requires brass "locator buttons" that drop into place at each station outside the shell plate in order to keep cartridges properly snugged up in the plate. These buttons make removing cartridges from intermediate stages (to check a powder charge for instance) difficult. Rather than use locator buttons, the LnL employs a circular coil spring that goes around the shellplate to hold the cartridge in place. Not only does this eliminate the need for different locator pins for different size cartridges, it makes it easy to remove cartridges from any part of the shellplate. Finally, the Hornady shellplate is easier to change out than the 550's. The 550's shellplate is retained with an awkward allen-head bolt and a set screw. The LnL shellplate is retained with single hex head screw that only needs to be hand-tightened.
Early incarnations of the Hornady Lock-N-Load AP received some bad press for their priming system. Thankfully, in February 2003, all LnL's began shipping with an improved priming system (which was also made available for retrofit on older presses). Anecdotally, this priming system is more reliable than the 550's. First, the new LnL priming system has fewer moving parts than the 550's and its parts are less subject to wear (witness the plastic feeder lips on the 550 primer tubes). The 550's priming system is complicated by the fact that the press must remove old primers and seat new primers in the same location. When depriming with the 550, spent primers are caught by a pivoting catcher that allows bits of debris from the spent primer to fall down into the press and are the principle reason the 550 tends to get so dirty. Further, spent primers are occassionally missed. After a reloading session with the 550, finding spent primers on the floor is almost inevitable. Since the LnL automatically turns the shellplate half a turn on the upstroke and half a turn on the downstroke, it is able to de-prime and prime in separate locations. The LnL deprimes directly into a brass tube to which a rubber hose is attached and routed into a trash can. This eliminates spent primers on the floor and prevents primer debris from dirtying the press. The result is that the LnL stays far, far cleaner than the 550. Maintainability of the LnL is further enhanced by the presense of zerk fittings for keeping the press lubricated. Finally, changing from small to large primers (or vice versa) on the LnL is significantly faster than the 550 (if the LnL primer tube is empty, if not it's only slightly faster).
650 Features at a 550 Price
For less than the price of a Dillon RL550B, the Hornady Lock-N-Load AP gives you all the features (and then some) of the Dillon XL650. The only area in which the XL650 beats the LnL is with an extra die station (even though the LnL and the XL650 both have five die stations, the LnL expands and charges separately). Like the XL650 (and unlike the 550), an automatic casefeeder can be installed on the LnL. You'll occassionally see that the casefeeder requires the purchase of a new "subplate"; this is only true for presses made before February 2003. Further, it is widely accepted that changing calibers on the XL650 is even more difficult (and expensive) than with the RL550B. The Hornady LnL caliber conversion process is easier and quicker than either the 550 or 650. Finally, the prices of caliber conversions for the LnL is slightly cheaper than the 550 (and a good deal cheaper than the 650). For reference, a typical LnL caliber conversion consists of: 1) 4 LnL bushings, 2) Deluxe powder die, 3) Die set, 4) Shellplate (if needed). You should also note that the prices of Hornady accessories tend to be more competitive than Dillon's. Unlike Dillon, which sells most of their merchandise directly with a very small number of resellers, Hornady's products are stocked by many retailers. While the LnL is an excellent choice for any reloader, the LnL is especially well-suited for those who reload (or plan to reload) many calibers.
Questions, comments, death threats? E-mail me at cort [at] vbrpc [dot] org.
P.S. to the guy I sold my 550 to: don't worry it's a great press!
