Diamond Pro MAX Review

Editors' review

You cannot buy the Diamond Pro MAX online or off a big-box wall; it is a Pro Shop Exclusive, sold and fitted only through independent Diamond dealers, and that positioning tells you what it is trying to be. This is the bow in Diamond's value line that got the grown-up hardware: a caged, machined-aluminum riser and the patented Synchronized Binary Cam System, wrapped around the widest adult fitting range in the family. One riser covers a 16 to 31 inch draw length and a 20 to 70 lb draw weight, which is enough spread to fit a short-draw five-foot-two shooter and a long-draw six-foot-four hunter without swapping a single part. It arrives as a complete, pro-shop-fitted package rather than a bare bow, and it sits a clear tier above the online grow-bows while asking you to walk into a shop and be measured for it. The Pro MAX is the current-generation answer to Diamond's older Pro 320, and the two headline upgrades, the caged riser and the binary cam, target exactly the things that older broad-adjustable bows did least well: rigidity and a settled shot. If you want one adult bow that a whole household can share and that still turns up to a real 70 lb hunting weight, this is the question the Pro MAX was built to answer.

Finish

In the United States the Pro MAX ships in a single finish, Mossy Oak Bottomland, the muted brown-and-black bark pattern that has quietly become the default for hardwood and early-season whitetail hunters. That is a deliberately narrow palette next to the color-of-the-week menus on some rival value bows, and it reflects the pro-shop-exclusive positioning: this is sold as a hunting tool, not a lifestyle color choice. Through the international and wider retail channels the same bow also appears in Black and Sandstone for shooters who want a cleaner or more neutral look, so the color is worth asking a dealer about before you commit. Diamond's dip finish holds up well to the handling a shared, often-adjusted bow takes over a season. Both right-hand and left-hand versions are offered, which matters on a family bow because a left-handed shooter in the household should not be pushed onto a right-handed grip. The finish is the one cosmetic decision here, and Bottomland is a sensible, do-everything default for the hunter this bow is aimed at.

Riser

The riser is where the Pro MAX earns its name over the cheaper bows in the line. It is a caged aluminum design, milled with an internal cage geometry rather than left as a plain extrusion, which is how Diamond stiffens the riser without adding bulk. In my experience the caged, machined riser is exactly where a value-tier bow should spend its engineering budget, because a rigid riser is what lets a broad-adjustable bow settle down and tune cleanly, and it is precisely the part the older non-caged Pro-series bows were softest on. Diamond's own pitch for the design is added stability and accuracy, and on a bow meant to be shot by several people at several draw settings, a riser that does not flex under different setups is what keeps the whole thing repeatable. The riser carries standard threaded bushings for the rest, sight and stabilizer that ship in the package, with no exotic mounting rail, which is the right call at this price. A 31 inch axle-to-axle length, the cam-to-cam measurement, gives the bow a long, stable geometry that hangs steady on target rather than twitching under a new shooter's hand. What the riser delivers is the two things that actually help a mixed-ability household shoot well: rigidity and a forgiving, stable frame.

Grip

The grip is a slim, direct-to-riser profile, the same low-frills approach Diamond uses across the value line, and it is a sensible choice for a bow that many different hands will hold. A narrow grip lets a shooter wrap the bow without the palm heel forcing a torqued, inconsistent hand position, and low-torque hand placement is one of the first things that separates a tidy group from a sprayed one. Because the Pro MAX is built to be shared, a grip that does not fight any particular hand size is more useful than a highly sculpted one tuned to a single shooter. Diamond's molded grips in this family have a squared, contoured shape that lets you feel where your hand sits on the riser, which helps a returning shooter find the same placement each session. An archer with very large hands may find it on the slim side, but the shape is a fair compromise for a bow that has to fit a range of people rather than one. Out of the box the grip needs no attention; it is set up to be picked up and shot.

Limbs

The Pro MAX runs a fiberglass-composite limb on a pivoting-pocket design, tuned to cover the full 20 to 70 lb range on the limb bolts. That 50 lb of draw-weight span is the number that defines the bow's working life: a partner or teen can shoot it at 30 or 40 lb while a full-grown hunter turns the same bow up to a legal, effective 70 lb big-game weight, all with an Allen wrench and no press. Diamond notes that the top-end weight can typically be backed off 10 lb from peak, which gives every shooter a comfortable draw without giving up the energy that matters downrange. The wide draw-weight window is what makes the Pro MAX a genuine one-bow-for-the-household proposition rather than a bow that fits one person and disappoints the rest. Fiberglass-composite limbs are the durable, forgiving choice for this tier, holding up to the repeated adjustment and general handling a shared bow sees. For a family or a first-time hunter, the ability to grow the draw weight over time, without new parts or a shop visit each step, is the practical heart of the design.

Eccentric System

The headline hardware is the Synchronized Binary Cam System, Diamond's patented dual-cam layout in which two symmetrical cams are slaved to each other so the string travels a flat, level path, which is what makes the bow both accurate and easy to tune. To change draw length you loosen the module screws and rotate the module across the 16 to 31 inch range; there are no separate cams or modules to buy and no press required, which is the whole point on a bow that will be reset repeatedly as different people pick it up. Draw weight adjusts the same press-free way on the limb bolts across the 20 to 70 lb span. IBO speed, the industry-standard chronograph rating measured at 30 inches of draw, 70 lb and a 350 grain arrow, is listed at 314 fps; because most Pro MAX owners shoot shorter draws and lighter weights, real-world arrow speeds land below that figure, and no independent chronograph data exists yet for this pro-shop-only model. Let-off, the percentage the holding weight drops to at full draw, is 80 percent, so at 70 lb a shooter holds 14 lb while aiming, a deep let-off that helps a mixed-ability household hold steady. Drawing a broad-adjustable Diamond of this platform, what stands out is how unaggressive the pull is for a bow rated past 300 fps; the emphasis here is on a smooth, tunable draw a range of shooters can manage, not on a stiff speed-bow cam. The binary layout is also the tuning story: symmetrical cams that stay in time are far easier to set and forget than a system that needs constant attention.

Draw Cycle/Shootability

A bow that has to fit and satisfy several shooters lives or dies on how forgiving and predictable it is, and the Pro MAX is built around that rather than around chasing speed. The 80 percent let-off keeps the holding weight low enough that a lighter or less experienced shooter can settle into a steady aim instead of fighting the bow at full draw, and the rotating-module draw stop can be set right where each shooter's anchor naturally falls. The binary cam gives a defined stop at the end of the draw, a consistent wall to pull into shot after shot, which is exactly the anchor discipline that keeps groups tight across different people. The 7.125 inch brace height, the distance from the grip to the string at rest, is on the tall, forgiving side for this class, giving the string more room to leave the bow before it can be influenced by a flinch or an imperfect release, which suits the beginner-to-intermediate hands this bow is aimed at. The predecessor Pro 320 generation, built before the caged riser, was noted to carry more vibration than its rivals, and the Pro MAX's caged riser is Diamond's direct answer to that; because no independent noise or vibration measurements exist for the Pro MAX yet, I am not going to put a number on its shot feel, but the design intent is clearly a steadier, more settled shot than the older platform delivered. What can be said with confidence is that the machined riser and slaved binary cams give the bow a rigid, repeatable foundation, the kind that rewards a consistent shooter rather than punishing a developing one.

Usage Scenarios

The Pro MAX is built for one clear job, being the single adjustable bow a whole household or a new hunter can grow into, and it fills that role well. Picture a couple where one partner draws 27 inches at 45 lb and the other draws 30 inches at 65 lb: the Pro MAX resets between them in a few minutes with an Allen wrench, no shop visit, so one bow genuinely serves both. Picture a new hunter who walks into a Diamond pro shop, gets measured, and leaves with the bow fitted, sighted and ready to practice that week, then takes it into a treestand for a first whitetail season inside 30 yards at a full 70 lb. It handles backyard practice, 3D club nights, indoor lanes and entry-to-mid-level hunting, and because the whole range adjusts without a press, it passes easily between a taller adult and a shorter partner or teen. Its 31 inch axle-to-axle length and tall brace make it a stable, forgiving target and hunting bow rather than a tight-quarters speed rig. What it is not built to be is a short, ultra-fast flagship for the experienced hunter who wants maximum speed and the quietest possible shot; that shooter is looking at a different class of bow, and the Pro MAX is honest about being the versatile, fit-everyone tool instead.

Diamond Pro MAX vs Bear Legit Maxx, PSE Stinger MAX

Bow	Diamond Pro MAX	Bear Legit Maxx	PSE Stinger MAX
Version	2026	2026	2021
Picture
Brace Height	7.125 "	6.25 "	7 "
AtA Length	31 "	30 "	30 "
Draw Length	16 " - 31 "	14 " - 30 "	21.5 " - 30 "
Draw Weight	20 lbs - 70 lbs	10 lbs - 70 lbs	45 lbs - 70 lbs
IBO Speed	314 fps	315 fps	304 fps - 312 fps
Weight	3.7 lbs	4.2 lbs	3.8 lbs
Let-Off	80%	75%	80%
Where to buy Best prices online	Not available now. Please check later.	$329 to $881.99 Compare prices	$125 to $650 Compare prices
	compare more bows

The broadly-adjustable hunting-package category has a few genuine alternatives, and the choice comes down to how small the smallest shooter is, how much you value stability, and what you are willing to spend. The Bear Legit Maxx is the closest philosophical match: it adjusts across a 14 to 30 inch draw and a 10 to 70 lb weight, reaching down to a smaller, lighter shooter than the Pro MAX can at its 20 lb floor, and it costs less at a $499 launch MSRP; but at 4.2 lb of measured mass it is heavier in the hand, its 6.25 inch brace height is shorter and less forgiving, and its 30 inch draw ceiling will not fit the tallest long-draw adults that the Pro MAX reaches at 31 inches. The PSE Stinger MAX is the value pick at a $449 package price with a 7 inch brace and 80 percent let-off, and it also climbs to 70 lb, but its 21.5 inch minimum draw and 30 inch maximum bracket a narrower fitting window than the Pro MAX's 16 to 31 inch span. The decision comes down to priorities: the Diamond Pro MAX for the buyer who wants the widest adult fitting range, the longest and most stable geometry, and a bow fitted at a pro shop; the Bear Legit Maxx for the household that needs the range to reach a smaller, lighter beginner and wants to spend less; and the PSE Stinger MAX for the shooter who wants the lowest package price and does not need the Pro MAX's shorter minimum draw or longer axle length.

Summary

The Diamond Pro MAX is the fit-everyone bow of the value hunting category, the one that solves the problem of a single adjustable bow serving very different shooters without compromise. At a $649 launch price it sits above the online grow-bows, and what that money buys is the grown-up hardware the cheaper bows go without: a caged, machined-aluminum riser and the patented Synchronized Binary Cam System, on a 31 inch axle-to-axle frame with a forgiving 7.125 inch brace. Its 16 to 31 inch draw and 20 to 70 lb range, all adjustable at home without a press, let one bow fit a short-draw partner and a long-draw hunter and everyone in between, while the 80 percent let-off keeps every one of them steady at full draw. The 314 fps IBO figure marks it as a capable rather than a blistering bow, which is the right balance for a platform built around fit and forgiveness instead of raw speed. What I keep coming back to is the combination of the pro-shop fitting and the fitting range: this is a bow you are measured for and that then flexes to fit the rest of your household, which very few bows at any price genuinely do. It is an excellent bow for the buyer who wants one adjustable, pro-fitted hunting bow a whole family can share and grow into, particularly strong for the mixed-draw household and the new hunter who wants to be set up correctly from day one. Buyers who need the range to reach a smaller, lighter beginner or who want to spend less should also look at the Bear Legit Maxx, and shooters who want the lowest package price might prefer the PSE Stinger MAX.