Vacuum Sealers for Ground and Portioned Wild Game: External vs Chamber Models

Why grinding day puts more strain on a vacuum sealer than a kitchen does

A vacuum sealer that handles a few steak portions a week can struggle once you are bagging ground venison, trim and fresh sausage after a processing day. The grinder, sausage stuffer and jerky gun all finish in the same few hours, so the sealer has to run back-to-back cycles on wet, soft, cold product.

Ground meat is the hard case. It is moist, it packs tightly, and fresh grind sheds liquid as it warms. Bulk batches also mean many bags in a row. Heat builds in the seal bar and pump, and a small unit that needs a cool-down between cycles turns a one-hour job into an evening.

Four questions decide the purchase: how the machine removes air from a wet pack, how wide a bag the seal bar can close, how many consecutive cycles it runs without a rest, and what bags it needs. External and chamber machines answer these differently, and the differences matter more for ground game than for dry goods.

How external sealers work and where ground venison trips them up

An external sealer, the common FoodSaver-style machine and larger units such as the Weston Pro-2300, leaves the open end of the bag outside the machine. The mouth sits across a channel in the machine, a pump pulls air out through that channel, and a heated seal bar then melts the bag closed. The bag has to be a channeled or textured type, because the embossed pattern is what lets air escape along the bag walls.

The weakness is that the pump pulls from the same place the meat sits. Any liquid or fine particles near the bag mouth can travel into the vacuum channel. FoodSaver’s own manuals tell owners to empty the drip tray after each use and say small amounts of liquid, crumbs or food particles can be pulled into the channel. Fresh ground venison, with its loose surface and free moisture, is exactly that kind of product.

Two habits keep an external machine working on ground game. First, freeze the packs partly or fully flat before sealing, which stops the surface from shedding liquid. FoodSaver guidance on moist foods points the same way: pre-freeze, or pause the cycle and seal manually before liquid reaches the bar. Second, leave generous empty bag above the meat, so the seal bar closes on clean plastic. A wet or greasy seal line is the usual cause of packs that lose their vacuum in the freezer.

How chamber sealers work and why they suit wet, bulk packaging

A chamber sealer puts the whole bag, meat included, inside a lidded chamber. The pump lowers the pressure of the entire chamber, so the pressure inside and outside the bag falls together and nothing is pulled out of the bag. The seal bar then closes the bag while it is still under vacuum, and air returns to the chamber. Because the bag is not drawing air through a channel, liquids stay put and ordinary smooth pouches work, which usually costs less per bag than channeled stock.

The VacMaster VP215 is a common example of this class. Its spec sheet lists an 11.25 by 15.25 by 5 inch chamber, a 10 inch seal bar, a 1/4 HP rotary oil pump and a 20 to 40 second cycle. It is a rotary oil pump unit, so oil care is part of ownership. Check the manufacturer manual for the change schedule and the oil grade, rather than guessing from other brands.

The trade-offs are size and cost. The unit is roughly 20 inches wide and 14 inches deep, with the lid raising the height to around 15 inches, so it needs a permanent spot on a bench near the grinder. It also costs well above a typical external machine. For a hunter who bags several deer a season, ground venison, sausage links and trim that can run to dozens of packs, the wet-pack tolerance is usually what justifies it.

Seal bar length, chamber depth and bag size for ground packs and sausage

Bag width is limited by the seal bar. A 10 inch bar closes a bag up to about 10 inches wide, so a one-pound flat pack of ground venison fits easily, while a wide pouch holding a rolled sausage ring or a large roast does not. A longer external seal bar, such as the 15 inch bar on the Weston Pro-2300, takes wider bags and larger roasts, though external bag length is a roll-cutting matter rather than a machine limit.

On a chamber machine, the chamber height and depth set the maximum bag. The bag lies flat with its mouth across the bar, and the rest has to fit inside the chamber. A 5 inch chamber height handles flat one-pound packs, bratwurst-length links and trimmed backstrap, but not a tall, stacked bag. Chamber machines also ship with filler plates that raise the bag so its mouth sits at the seal bar, which makes a difference for shallow packs.

Check the manufacturer’s bag-thickness limits too. Heavier mil ratings protect against freezer burn and bone punctures on roasts and ribs, but only if the seal bar can fuse that thickness. A spec sheet should list the thickness range and the bar width it fits, so read it before ordering a case of bags.

Matching bag type to what you are freezing

Ground venison belongs in flat, one-pound or half-pound packs. Flat packs freeze fast, stack neatly, thaw evenly and let you break off just what a recipe needs. Portioning also keeps you from refreezing thawed grind, which damages texture in lean game.

Sausage, jerky and cured items need different handling. Fresh sausage links hold their shape if you partly freeze them on a tray first, then seal them in a single layer. Jerky strips, which come out of a jerky gun at a set diameter, seal best once dried and cooled, in a narrow bag that does not crush them. Cubed or pre-chilled trim waiting for the grinder can be sealed ahead of time, so grinding day starts with cold, ready meat.

With an external machine, buy the maker’s channeled rolls and cut them to length, which lets you make a bag exactly as long as the pack. With a chamber machine, use smooth chamber pouches. Sealing smooth pouches in an external machine will not pull a vacuum, since no channel carries the air out.

Which type to buy by how much game you process

For one deer a year, an external machine is enough. Pre-freeze the packs flat, keep the bag mouth clean and accept a slower pace. The ongoing cost is the channeled roll, which is the main drawback of the format.

For two to four deer, or sausage and jerky batches on top, a larger external unit with a long seal bar and a continuous-duty pump is the middle option. Look for a double-seal option, a manual seal control for pausing the cycle on moist packs, and a drip tray that is easy to empty and wash.

For elk, moose or bear, or for a hunter who processes game for family and friends every fall, a chamber machine such as the VP215 class makes sense. It tolerates fresh, wet grind, runs on cheaper pouches, and its cycle time keeps a bagging line moving behind a high-capacity grinder. Pair the sealer’s pace to the grinder’s output, since a unit that fills pouches faster than a sealer can close them stacks up filled bags warming on the bench.

Whichever you pick, a vacuum seal does not replace refrigeration or freezing. FoodSaver’s manuals state that vacuum sealing is not a substitute for canning and that perishables still need to be refrigerated or frozen. Freeze the packs promptly after sealing.

Upkeep and failure modes after a heavy processing day

External machines fail most often at the seal. Grease or liquid on the bag mouth gives a weak seal that looks fine and then loses vacuum in the freezer. Wipe the gasket and seal bar between batches, empty and rinse the drip tray, and let the bar cool between long runs. A stretched or flattened gasket is a common wear item, so check the manual for the replacement part number for your exact model instead of guessing from a similar machine.

Chamber machines fail differently. The oil in a rotary pump gets cloudy as moisture and vapor from meat contaminate it, which weakens the vacuum and lengthens the cycle. Follow the maker’s oil change guidance, and use the oil they specify. The lid gasket and the seal pad also wear, so keep spares and look for cracks or flat spots.

On either type, a long run of packs is a good time to spot-check seal quality. Press a sealed pack, look for a clean, wrinkle-free seam and watch for packs that puff up after a few hours, which means a leak. Re-seal any suspect pack right away, before it goes into the freezer.

Shop VacMaster VP215 chamber vacuum sealer for Vacuum Sealers for Ground and Portioned Wild Game: External vs Chamber Models

Shop FoodSaver vacuum sealer for Vacuum Sealers for Ground and Portioned Wild Game: External vs Chamber Models

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• Meat Grinder Meat Cubing and Pre-Chilling: How to Keep Venison Cold to Prevent Smearing
• Meat Grinder Sausage Casings and Fat Ratios: How Much Fat to Add to Lean Venison Before Grinding

FAQ

Can an external vacuum sealer handle fresh ground venison?

Yes, with care. Freeze the packs flat first, or pause the cycle and seal manually before liquid reaches the bag mouth, because an external machine draws air through a channel that wet meat can enter. Leave a clean stretch of empty bag above the meat and empty the drip tray after each use.

Do chamber sealers need special bags?

They use smooth pouches rather than the embossed, channeled bags an external machine requires. Check the machine’s listed bag-thickness range and seal bar width against the pouches you plan to buy. A pouch wider than the seal bar will not close properly.

How wide a bag does a 10 inch seal bar take?

A 10 inch bar closes a bag roughly up to that width, which suits flat one-pound packs and sausage links. Larger roasts or rolled rings need a wider bar, so compare the manufacturer’s seal-bar length with the bags you intend to use before buying.